Perhaps you should try some spelling variations:
nganh khong » nhanh chong, nganh nong, nganh khoa
nganh cong » nhanh chong, thanh cong
sach thuc » cach thuc, sach thu, sach thue
van nhan » van phan, van thanh, danh nhan
nhan dan » phan dau, gian dan, nhan tai
so sach » so sanh, bo sach, co sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
ma va » ma van, mua va, me va

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 thuc pham, nghien cuu mon hoc ((nganh khong) or (nganh cong)) hoc ma va van nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thuc pham, nghien cuu mon hoc ((nganh khong) OR (nganh cong)) hoc ma va van nhan dan.
• Adding a wildcard symbol may retrieve word variants: so sach thuc pham, nghien cuu mon hoc ((nganh khong) or (nganh cong)) hoc ma va van nhan dan*.