Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
dung cong » dung trong
sach hoc » cach hoc, sach hoi, mach hoc
khoa hoc » hoa hoc
te sach » toc sach
mon hoc » toan hoc, dong hoc
hoi anh » hoi danh, hoc anh, hai anh
tuan va » toan va, luan va, quan va
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 hoc tap, nghien cuu ((mon hoc) or (dung cong)) nganh khoa hoc xa hoi anh tuan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoc tap, nghien cuu ((mon hoc) OR (dung cong)) nganh khoa hoc xa hoi anh tuan va.
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cuu ((mon hoc) or (dung cong)) nganh khoa hoc xa hoi anh tuan va*.