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
cong coc » cong cuoc, cong cac, cong co
tu sach » thu sach, su sach, tu cach
te sach » toc sach
va pham » van pham, 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 (te sach)) hoi dap, nghien thu cong coc nganh khong hoc xa hoi va pham van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) hoi dap, nghien thu cong coc nganh khong hoc xa hoi va pham van.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) hoi dap, nghien thu cong coc nganh khong hoc xa hoi va pham van*.