Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
quan nhung » qua nhung, luan chung, quang hung
hieu lang » hieu quang, nhieu tang, hieu van
cua nhung » va nhung
tan thanh » tran thanh, tang thanh, toan thanh
thanh mau » hanh mau, thanh san, thanh hai
cong tan » cong tac, cong san, cong thanh

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

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