Perhaps you should try some spelling variations:
thieu qua » thieu cua, thieu quang, thien quan
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tran » hanh trang, thanh tran, hanh tram
hung cong » nhung cong, hung cuong, phung cong
tran van » luan van
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 cao » chan cho, chat cao, chay cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi ((hieu lang) or (((hieu qua) or (thieu qua)))) - hanh tran van hung cong dan chan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi ((hieu lang) OR (((hieu qua) OR (thieu qua)))) - hanh tran van hung cong dan chan cao.
• Adding a wildcard symbol may retrieve word variants: hoi ((hieu lang) or (((hieu qua) or (thieu qua)))) - hanh tran van hung cong dan chan cao*.