Perhaps you should try some spelling variations:
luan dung » lan dung, luan dong, luan hung
tang luan » dung luan
dung cong » dung trong
chu sang » thu sang, chieu sang, chuc nang
chu bang » thu bang, chuc nang, chu quang
anh tang » anh bang, anh dang, anh nang
cong tac » cong ty
tac tren » rac tren, tai tren, tap tren
tren cau » tren ca, tren cay, tren tau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu sang) or (chu bang)) - anh tang luan dung cong tac tren cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sang) OR (chu bang)) - anh tang luan dung cong tac tren cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chu sang) or (chu bang)) - anh tang luan dung cong tac tren cau*.