Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
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 - anh nang suat ((nhung cong) OR (dung cong)) san than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - anh nang suat ((nhung cong) OR (dung cong)) san than cau".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - anh nang suat ((nhung cong) OR (dung cong)) san than cau*.