Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
sach hoc » cach hoc, sach hoi, mach hoc
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan
nhan tai » hang tai, van tai, toan tai
tu sach » thu sach, su sach, te sach
mo hoc » mon hoc, co hoc
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

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