Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nganh khong » nganh cong, nhanh chong, nganh nong
thuoc mai » thuoc ma, thuoc tai, thuoc moi
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
co nganh » hoc nganh, cac nganh, moi nganh
nhan dan » phan dau, gian dan, nhan tai
phan van » pham van, thanh van, luan van
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi

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