Vietnam Birding

If we consider the hood of a bird including the head, the neck and throat, then what is the name of a black-hooded bird in Vietnam with a white stripe on the nape?

1/ Red-billed blue magpie (Urocissa erythroryncha) 

What is that bird in Vietnam in black?

1/ Sooty babbler (Stachyris herberti)

2/ Some drongos: black, hair-crested, racket-tailed...

3/ Some mynas: great myna, crested myna

3/ Some crows

4/ Turdus mandarinus (Chinese blackbird)

What is the name of the bird in Vietnam with a brown or dark brown stain around the bill?

1/ Clicking shrike-babbler (Pteruthius intermedius) 
Male

2/ Blue-winged leafbird (Chloropsis moluccensis) 

3/ Golden-fronted leafbird (Chloropsis aurifrons)

The birds in Vietnam with a chestnut cap (or dark-browned cap) could be:

1/ Chestnut-capped babbler (Timalia pileata)

The bird in Vietnam with a blue or white line on the base of the neck could be:

1/ Birds of the genus Niltava

The birds in Vietnam with a rufous cap (or light-browned cap) could be:

1/ Rufous-capped babbler (Cyanoderma ruficeps) 

The birds in Vietnam with a white cap could be:

1/ White-capped redstart or white-capped water redstart (Phoenicurus leucocephalus)

The birds in Vietnam with black eyeline could be:

1/ Pied triller (Lalage nigra)
2/ Some shrikes
3/ Some pittas
4/ Some barbets

What is that bird in Vietnam with black-scaled underparts?

1/ Dusky thrush (Turdus eunomus) 
2/ Dark-sided thrush (Zoothera marginata)

3/ White's thrush (Zoothera aurea)
4/ Scaly thrush (Zoothera dauma) 

The birds in Vietnam with a chestnut head could be:

1/ Chestnut-headed tesia (Cettia castaneocoronata)

The birds in Vietnam with a chestnut throat (or dark-browned throat) could be:

1/ Black-eared shrike-babbler (Pteruthius melanotis)

What is the name of the bird in Vietnam with grey upper head and nape which makes it look like a man with grey hair?

1/ Daurian redstart (Phoenicurus auroreus)
Male

What is that bird in Vietnam with reddish brown-scaled underparts?

1/ Naumann's thrush (Turdus naumanni) 

The birds in Vietnam with reddish-brown vent could be:

1/ Eurasian hobby 
(Cắt Trung Quốc, Falco subbuteo) or just hobby

What is that bird in Vietnam with upper body black and lower body white?

1/ Jerdon's bush chat (Saxicola jerdoni) 

2/ Flycatcher-shrikes (Hemipus)
The bar-winged flycatcher-shrike 
The black-winged flycatcher-shrike

3/  Little pied flycatcher (Ficedula westermanni) 

The birds with a alack head in Vietnam could be:

1/ Black-headed Sibia
Heterophasia desgodinsi
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2/ Black-headed bunting 
(Emberiza melanocephala)
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3/ Chat (Saxicola): 
Siberian stonechat or Asian stonechat (Saxicola maurus),
Amur stonechat (Saxicola stejnegeri) or Stejneger's stonechat

What is the name of the bird in Vietnam with a white stripe on each black wing?

1/ Oriental magpie-robin (Copsychus saularis)

2/ Bar-winged flycatcher-shrike (Hemipus picatus)

3/ Little pied flycatcher (Ficedula westermanni)
Male

What is that bird in Vietnam with an orange line on each wing?

1/  Stripe-throated yuhina (Yuhina gularis)

If we consider the hood of a bird including the head, the neck and throat, then what is the name of the bird in Vietnam with ashy hood?

1/ Ashy-throated warbler (Phylloscopus maculipennis) 

If we consider the hood of a bird including the head, the neck and throat, then what is the name of the bird in Vietnam with black hood?

1/ Black-hooded oriole (Oriolus xanthornus)

2/ Blyth's paradise flycatcher (Terpsiphone affinis), also called the oriental paradise flycatcher

3/ Amur paradise flycatcher (Terpsiphone incei)

4/ Black paradise flycatcher (Terpsiphone atrocaudata), also known as the Japanese paradise flycatcher

5/ Chestnut munia or black-headed munia (Lonchura atricapilla)

6/ Collared laughingthrush (Trochalopteron yersini) 

7/ Black-headed Bulbul
Microtarsus melanocephalos