Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, nhieu tang
van thang » van thanh, van khang, van hang
doc hieu » toc thieu, hoc thieu, hoc hien
le trong » le trung, ly trong, le tang
dan chan » dan gian, dan ca, van chat
ban than » ban thanh, van thanh, ban hang
tung le » tuong le, tang le, dung le

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu lang - thanh tung le trong cong ((((dan chan) or (van thang))) or (ban than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu lang - thanh tung le trong cong ((((dan chan) OR (van thang))) OR (ban than)) cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - thanh tung le trong cong ((((dan chan) or (van thang))) or (ban than)) cao*.