Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
thuat sach » thuat lanh, thuat san
goc nganh » hoc nganh, hoc nhanh, cac nganh
sach hoi » sach doi, sach moi, cach thoi
toan ban » van ban
cuu mot » cua mot, cuu mo, huu mot
va toan » van toan, bai toan, tap toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach hoi dap, nghien cuu mot goc nganh khong ((hoc xa) or (hoc ma)) hoi va toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach hoi dap, nghien cuu mot goc nganh khong ((hoc xa) OR (hoc ma)) hoi va toan ban.
• Adding a wildcard symbol may retrieve word variants: thuat sach hoi dap, nghien cuu mot goc nganh khong ((hoc xa) or (hoc ma)) hoi va toan ban*.