Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong thuoc » khang thuoc, hong phuoc, dong 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 khong thuoc ma hoi ((va nhan) OR (ca nhan)) van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoc tap, nghien cuu mon hoc nganh khong 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 khong thuoc ma hoi ((va nhan) OR (ca nhan)) van*.