Perhaps you should try some spelling variations:
nganh cong » nhanh chong, thanh cong
cong thuoc » cong thuc, dong thuoc, long thuoc
hoc nganh » hoc nhanh
sach hoc » cach hoc, sach hoi, mach hoc
thuoc ma » hoc ma, duoc ma
te sach » toc sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va nhan » van nhan, va phan, va nha
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: te sach hoc tap, nghien cuu mon hoc nganh cong thuoc ma hoi ((va nhan) or (ca nhan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoc tap, nghien cuu mon hoc nganh cong thuoc ma hoi ((va nhan) OR (ca nhan)) van.
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cuu mon hoc nganh cong thuoc ma hoi ((va nhan) or (ca nhan)) van*.