Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
cua duong » cua dong, cua huong, tuan duong
qua duong » quan duong, qua dung, qua dong
chi hanh » chi nhanh, chi thanh, thi hanh
anh tang » anh bang, anh dang, anh nang
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu xanh) or (chi hanh)) - anh tang ((cua duong) or (qua duong)) cong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chi hanh)) - anh tang ((cua duong) OR (qua duong)) cong tap toan cao.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chi hanh)) - anh tang ((cua duong) or (qua duong)) cong tap toan cao*.