Perhaps you should try some spelling variations:
hanh tranh » hanh trinh, hanh trang, lanh tranh
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cua dung » cua dang, cua dong, qua dung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
chan cao » chan cho, chat cao, chay cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - ((hanh tranh) OR (canh tranh)) cua dung ((cong dan) or (cong san)) chan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - ((hanh tranh) OR (canh tranh)) cua dung ((cong dan) OR (cong san)) chan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - ((hanh tranh) OR (canh tranh)) cua dung ((cong dan) or (cong san)) chan cao".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - ((hanh tranh) OR (canh tranh)) cua dung ((cong dan) or (cong san)) chan cao*.