Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
cua nhung » va nhung
dung cua » dung luan, dung cho
van tuan » van quan, van ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - thanh dung cua nhung cong ((van tuan) or (anh tuan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh dung cua nhung cong ((van tuan) OR (anh tuan)) tap*.