Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoc » cach hoc, sach hoi, mach hoc
cong coc » cong cuoc, cong cac, cong co
cong cau » cong cu, cong chuc, thong cau
phan van » pham van, thanh van, luan van
te sach » toc sach
hoc lai » hoc dai, hoc bai, hoc lam
lai hoi » dai hoi, lai hoa, lai roi
va phan » van phan, va phat, va phap

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 ((cong coc) or (cong cau)) nganh khong hoc lai hoi va phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoc tap, nghien cuu ((cong coc) OR (cong cau)) nganh khong hoc lai hoi va phan van.
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cuu ((cong coc) or (cong cau)) nganh khong hoc lai hoi va phan van*.