Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
cap dung » ap dung, cao dung, chan dung
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - ((thanh trung) or (thanh cong)) cap dung cong tac tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((thanh trung) OR (thanh cong)) cap dung cong tac tran cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((thanh trung) or (thanh cong)) cap dung cong tac tran cau*.