Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
thanh tung » thanh cong
tung thanh » trung thanh, tang thanh, dung thanh
thanh dung » thanh duong, thanh hung, hanh dung
thanh pham » thanh phan, thanh hai
hieu lang » hieu quang, nhieu tang, hieu van
dung cong » dung trong
cong tran » cong tan, cong tuan, cong toan

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) OR (chieu sang)) - thanh tung thanh dung cong tran ((thanh pham) or (thanh pho))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sang)) - thanh tung thanh dung cong tran ((thanh pham) OR (thanh pho)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (chieu sang)) - thanh tung thanh dung cong tran ((thanh pham) or (thanh pho))".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (chieu sang)) - thanh tung thanh dung cong tran ((thanh pham) or (thanh pho))*.