Perhaps you should try some spelling variations:
nghien chuc » nghien cuu, nghiem thuc, nghiep thuc
thuoc nhanh » thuoc nhan, thuoc thanh, thuc hanh
nang thuoc » dang thuoc, nang thuc, sang thuoc
nhanh hoa » nhanh hoan, thanh hoa, khanh hoa
van thanh » ban thanh, van tuan
anh hoc » sinh hoc, benh hoc, hinh hoc
va phan » van phan, va phat, va phap
tu anh » tu hanh, tu manh, thu anh
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu anh hoc tap, nghien chuc nang thuoc nhanh hoa hoc ma hoi ((va phan) or (van thanh)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu anh hoc tap, nghien chuc nang thuoc nhanh hoa hoc ma hoi ((va phan) OR (van thanh)) van.
• Adding a wildcard symbol may retrieve word variants: tu anh hoc tap, nghien chuc nang thuoc nhanh hoa hoc ma hoi ((va phan) or (van thanh)) van*.