Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
chiet tach » chieu sach
hieu lang » chieu sang, hieu quang, nhieu tang
trong van » trong cac
hung cong » nhung cong, hung cuong, phung cong
van hung » van dung, manh hung, van duong
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chiet tach) or (hieu lang)) - thanh trong van hung cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chiet tach) OR (hieu lang)) - thanh trong van hung cong dan chan cau*.