Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hanh tranh » canh tranh, hanh trinh, hanh trang
cong thanh » dong thanh, cong trinh, cong tan
hieu lang » hieu quang, nhieu tang, hieu van
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
va dung » van dung, va duong, vat dung
pho cau » pho cap, pha cau, pho cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) OR (hieu lang)) - hanh tranh va dung cong thanh pho cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) OR (hieu lang)) - hanh tranh va dung cong thanh pho cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) OR (hieu lang)) - hanh tranh va dung cong thanh pho cau*.