Perhaps you should try some spelling variations:
thanh chuong » thanh huong, thanh cong, nhanh chong
thanh phuong » thanh huong, khanh phong, trinh phuong
hieu lang » chieu sang, hieu quang, nhieu tang
doi hieu » doi chieu, doc hieu, doi hien
van van » van ban, tan van, van vat
san van » tan van, luan van, tran van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - ((thanh phuong) or (thanh chuong)) cua cong dong ((van van) OR (san van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - ((thanh phuong) OR (thanh chuong)) cua cong dong ((van van) OR (san van)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - ((thanh phuong) or (thanh chuong)) cua cong dong ((van van) OR (san van)) ban".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - ((thanh phuong) or (thanh chuong)) cua cong dong ((van van) OR (san van)) ban*.