Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
trung quan » truong quan, trong quan, trung tuan
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
toan ban » van ban

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 quan dung cong tan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh trung quan dung cong tan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh trung quan dung cong tan ((toan cao) or (toan ban))*.