Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
nho hieu » nha hieu, nho sieu, nhu hieu
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh 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: nho hieu lang - ((hanh tang) or (canh tranh)) ((cua dung) or (cua ban)) cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho hieu lang - ((hanh tang) OR (canh tranh)) ((cua dung) OR (cua ban)) cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: nho hieu lang - ((hanh tang) or (canh tranh)) ((cua dung) or (cua ban)) cong dan toan cao*.