Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
thanh toan » thanh hoa, thanh san, tinh toan
hoc thanh » hoc nhanh, hoan thanh, hoc phan
thanh van » thanh san, thanh phan, thanh nhan
sanh hoc » sinh hoc, anh hoc, danh hoc
cong hoc » dong hoc, cong hoa, cong coc
so sanh » do sanh
hoc xa » hoc ma

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh hoc tap, nghien cua cong hoc thanh cong hoc xa hoi va ((thanh van) or (thanh toan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh hoc tap, nghien cua cong hoc thanh cong hoc xa hoi va ((thanh van) OR (thanh toan)).
• Adding a wildcard symbol may retrieve word variants: so sanh hoc tap, nghien cua cong hoc thanh cong hoc xa hoi va ((thanh van) or (thanh toan))*.