Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
sach hoi » sach doi, sach moi, cach thoi
dong luc » nang luc
khoa hoc » hoa hoc
nang dau » hang dau, xang dau, nang du
tu sach » thu sach, su sach, te sach
mon hoc » toan hoc, dong hoc
va nang » van nang, da nang, cam nang
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: tu sach hoi dap, nghien cuu ((mon hoc) or (dong luc)) nganh khoa hoc xa hoi va nang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi dap, nghien cuu ((mon hoc) OR (dong luc)) nganh khoa hoc xa hoi va nang dau.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi dap, nghien cuu ((mon hoc) or (dong luc)) nganh khoa hoc xa hoi va nang dau*.