Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, hieu van
dang cong » dung cong
tung cap » trung cap, cung cap, thong cap
tac chan » tac chuan, tac can, tac chon
chan cau » phan cau, can cau, chinh cau

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)) - thanh tung cap ((dang cong) or (cong dong)) tac chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (nhieu tang)) - thanh tung cap ((dang cong) OR (cong dong)) tac chan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (nhieu tang)) - thanh tung cap ((dang cong) or (cong dong)) tac chan cau*.