Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
coc nganh » hoc nganh, cac nganh, chuc nganh
khong hoc » khung hoc, thong hoc, khong thuoc
hoc sach » hoc sinh, hoc cac, hoc anh
cong coc » cong cuoc, cong cac, cong co
phan van » pham van, thanh van, luan van
tu sach » thu sach, su sach, te sach
va phan » van phan, va phat, va phap
hoc xa » hoc ma

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

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