Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
nhieu tang » chieu sang, nhiet nang
nhung cong » dung cong, thong cong, nhung don
hieu lang » chieu sang, hieu quang, hieu van
hang cong » dang cong, hang nong, bang cong
trinh va » trinh van, trinh vat, trinh ve
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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 (nhieu tang)) - canh trinh va ((nhung cong) or (hang cong)) tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (nhieu tang)) - canh trinh va ((nhung cong) OR (hang cong)) tan toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (nhieu tang)) - canh trinh va ((nhung cong) or (hang cong)) tan toan cau*.