Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
cong thanh » dong thanh, cong trinh, cong tan
cong manh » cong danh, duong manh, hoang manh
ho chieu » theo chieu, hoc thieu, doi chieu
van dung » van dong, xay dung, tin dung
toan tap » toan ban
va dung » va duong, vat dung, va ung

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

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