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