Perhaps you should try some spelling variations:
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tang » hanh trang, hanh mang, hanh tung
cua trong » cua truong, cua trung, qua trong
anh tang » anh bang, anh dang, anh nang
cong tam » cong tac, cong tan, cong nam
tam than » ban than
than lap » thanh lap, phan lap, toan lap

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 tang) or (anh tang)) cua trong cong tam than lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - ((hanh tang) OR (anh tang)) cua trong cong tam than lap.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - ((hanh tang) or (anh tang)) cua trong cong tam than lap*.