Perhaps you should try some spelling variations:
truong quan » thong quan, luong quan, truong van
trong quan » thong quan, tong quan, thong quang
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh

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 - thanh ((truong quan) OR (trong quan)) nhung ((cong dan) or (cong tan)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - thanh ((truong quan) OR (trong quan)) nhung ((cong dan) OR (cong tan)) phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - thanh ((truong quan) OR (trong quan)) nhung ((cong dan) or (cong tan)) phan tu".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - thanh ((truong quan) OR (trong quan)) nhung ((cong dan) or (cong tan)) phan tu*.