Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
ho chieu » theo chieu, hoc thieu, doi chieu
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
tap toan » tap doan, tap quan, bai toan
toan ban » van ban
ung tap » rung tap, ung tac, nhung tap
cho he » cho thue

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (cho he)) xanh - hanh tranh ((cua dung) OR (cua dang)) ung tap toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (cho he)) xanh - hanh tranh ((cua dung) OR (cua dang)) ung tap toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (cho he)) xanh - hanh tranh ((cua dung) OR (cua dang)) ung tap toan ban*.