Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
nhan dan » phan dau, gian dan, nhan tai
mo hoc » mon hoc, co hoc
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: thu sach hoc tap, nghien cuu mo hoc nganh khoa ((hoc xa) or (hoc ma)) hoi ca nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach hoc tap, nghien cuu mo hoc nganh khoa ((hoc xa) OR (hoc ma)) hoi ca nhan dan.
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien cuu mo hoc nganh khoa ((hoc xa) or (hoc ma)) hoi ca nhan dan*.