Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
cuong danh » cuon danh, huong dan, cuong linh
doi chieu » doc hieu, doi chi, ho chieu
danh toan » manh toan, anh toan, dan toan
toan cao » toan ban, toan tap
va hang » van hang, va nang, va lang

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 ((va hang) or (cam nang)) cuong danh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trung ((va hang) OR (cam nang)) cuong danh toan cao*.