Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nganh khoa » nganh hoa, doanh khoa, anh khoa
sach doi » sach hoi, sach moi, sach dao
nhan van » nhan dan, nhan va, phan van
te sach » toc sach
doi tap » doi tac, doi dap, doi tai
va nhan » van nhan, ca nhan, va phan
mo hoc » mon hoc, co hoc
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: te sach doi tap, nghien cuu mo hoc ((nganh khoa) or (nganh khong)) hoc xa hoi va nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach doi tap, nghien cuu mo hoc ((nganh khoa) OR (nganh khong)) hoc xa hoi va nhan van.
• Adding a wildcard symbol may retrieve word variants: te sach doi tap, nghien cuu mo hoc ((nganh khoa) or (nganh khong)) hoc xa hoi va nhan van*.