Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, manh truong
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
truong va » truong dai, truong cao, truong dao
toc hieu » toc thieu, doc hieu, hoc thieu
dan than » dan chan, ban than, dan toan
van chat » cao chat
van than » van thanh, van thang, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu lang - hanh truong va nhung cong ((((dan than) or (van chat))) or (van than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu lang - hanh truong va nhung cong ((((dan than) OR (van chat))) OR (van than)) ban.
• Adding a wildcard symbol may retrieve word variants: toc hieu lang - hanh truong va nhung cong ((((dan than) or (van chat))) or (van than)) ban*.