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
cua nhan » ca nhan, cua ngan, cua nha
nhan dan » phan dau, gian dan, nhan tai
tu sach » thu sach, su sach, te sach
hoi cua » hoi chuc
mo hoc » mon hoc, co hoc

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) or (hoc ma)) hoi cua nhan dan~.
• 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) OR (hoc ma)) hoi cua nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu mo hoc nganh khoa ((hoc xa) or (hoc ma)) hoi cua nhan dan*.