Perhaps you should try some spelling variations:
nganh khong » nhanh chong, nganh nong, nganh khoa
nganh cong » nhanh chong, thanh cong
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan
sach hoc » cach hoc, sach hoi, mach hoc
thuoc va » thuc va, thuoc ma, thuong va
so sach » so sanh, bo sach, co sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoi van » hoi va, hoi dan, hai van
va hoi » xa hoi, va hoc, va hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach hoc tap, nghien cuu mon hoc ((nganh khong) or (nganh cong)) thuoc va hoi van thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoc tap, nghien cuu mon hoc ((nganh khong) OR (nganh cong)) thuoc va hoi van thanh van.
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien cuu mon hoc ((nganh khong) or (nganh cong)) thuoc va hoi van thanh van*.