Perhaps you should try some spelling variations:
dong thuoc » dung thuoc, dang thuoc, don thuoc
nganh dong » nganh cong, nhanh dong, nganh nong
hoc nganh » hoc nhanh
thuoc ma » hoc ma, duoc ma
sach doi » sach hoi, sach moi, sach dao
thu sach » tu sach, thuat sach, thuoc sach
mon hoc » toan hoc, dong hoc
cuu mon » cuu mo, cuu mot, cuu cong
hoi cau » hoi chu, hoc cau, hoa cau
hoi cua » hoi chuc
doi tac » dong tac
nhan va » nhan tai, nhan dan, nhan tao

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 doi tac, nghien cuu mon hoc nganh dong thuoc ma ((hoi cau) or (hoi cua)) nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach doi tac, nghien cuu mon hoc nganh dong thuoc ma ((hoi cau) OR (hoi cua)) nhan va.
• Adding a wildcard symbol may retrieve word variants: thu sach doi tac, nghien cuu mon hoc nganh dong thuoc ma ((hoi cau) or (hoi cua)) nhan va*.