Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
khung hoc » chung hoc, nhung hoc, thuong hoc
sach hoc » cach hoc, sach hoi, mach hoc
mau nhan » mau han, mau chan, mau phan
nhan dan » phan dau, gian dan, nhan tai
te sach » toc sach
cuu mon » cuu mo, cuu mot, cuu cong
hoa mau » hoa may, hoa cau, hoa dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach hoc tap, nghien cuu mon ((hoc nganh) or (hoc dan)) khung hoc ma hoa mau nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoc tap, nghien cuu mon ((hoc nganh) OR (hoc dan)) khung hoc ma hoa mau nhan dan.
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cuu mon ((hoc nganh) or (hoc dan)) khung hoc ma hoa mau nhan dan*.