Perhaps you should try some spelling variations:
sinh trong » sinh truong, sinh trung, dinh trong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
trong ca » trong cac, trong nha
ca trong » cay trong, cad trong, co trong
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 - sinh trong ca trong ((cong dan) or (cong tan)) ((toan ban) OR (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - sinh trong ca trong ((cong dan) OR (cong tan)) ((toan ban) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - sinh trong ca trong ((cong dan) or (cong tan)) ((toan ban) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - sinh trong ca trong ((cong dan) or (cong tan)) ((toan ban) OR (van ban))*.