Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, nhung don
hieu lang » hieu quang, nhieu tang, hieu van
hang cong » dang cong, hang nong, bang cong
anh nang » ganh nang, anh bang, anh dang
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu lang) or (chieu sang)) - anh nang suat ((nhung cong) OR (hang cong)) san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (chieu sang)) - anh nang suat ((nhung cong) OR (hang cong)) san than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) or (chieu sang)) - anh nang suat ((nhung cong) OR (hang cong)) san than cau".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (chieu sang)) - anh nang suat ((nhung cong) OR (hang cong)) san than cau*.