Perhaps you should try some spelling variations:
nganh khoa » nganh khong, doanh khoa, anh khoa
nganh hoa » thanh hoa, khanh hoa, danh hoa
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
sach hoc » cach hoc, sach hoi, mach hoc
tu sach » thu sach, su sach, te sach
hai ban » hai bang, hai ba, tai ban
mo hoc » mon hoc, co hoc
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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 hoc tap, nghien cuu mo hoc ((nganh khoa) or (nganh hoa)) hoc xa hai ban thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu mo hoc ((nganh khoa) OR (nganh hoa)) hoc xa hai ban thanh van.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu mo hoc ((nganh khoa) or (nganh hoa)) hoc xa hai ban thanh van*.