Id Snails Please

[~T~]

Ok so I'm currently living in Hanoi, Vietnam. I have a planted goldfish bowl (filtered) and recently found a few snails in the lake next to me (Ho Tay - West Lake). I'm not sure of the species, some kind of trapdoor snail maybe? All I can find about West Lake snails are places that sell them to eat or recipes, not something I would advise as West Lake is very polluted. 
 
Anyway here are my snails. Any ideas?
 
 

 

[Donya]

Yes, these are trapdoor snails, or Viviparids (family Viviparidae). The ridged one may be a species of Filopaludina, but I'm not very familiar with the Viviparids present in your region.