Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
sach doi » sach hoi, sach moi, sach dao
lang dau » hang dau, xang dau, nang dau
te sach » toc sach
doi tap » doi tac, doi dap, doi tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va lang » va nang, hoa lang
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: te sach doi tap, nghien cuu mon hoc ((nganh khoa) or (thanh cong)) hoc xa hoi va lang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach doi tap, nghien cuu mon hoc ((nganh khoa) OR (thanh cong)) hoc xa hoi va lang dau.
• Adding a wildcard symbol may retrieve word variants: te sach doi tap, nghien cuu mon hoc ((nganh khoa) or (thanh cong)) hoc xa hoi va lang dau*.