Perhaps you should try some spelling variations:
nhanh dong » hanh dong, nhanh chong, anh dong
dong thuoc » dung thuoc, dang thuoc, don thuoc
hoc nhanh » hoc nganh, hoc phan
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
thuoc ma » hoc ma, duoc ma
phan van » pham van, thanh van, luan van
nhan tao » nhan tai, nhan dan
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: thu sach hoc tap, nghien cuu dong hoc nhanh dong thuoc ma hoi va ((phan van) or (nhan tao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach hoc tap, nghien cuu dong hoc nhanh dong thuoc ma hoi va ((phan van) OR (nhan tao)).
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien cuu dong hoc nhanh dong thuoc ma hoi va ((phan van) or (nhan tao))*.