Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhieu tang » chieu sang, hieu lang
nhiet nang » nhiet dong, viet nang, thien nang
trong san » trong cac, cong san, dong san
cam dung » am dung, cao dung, cap dung
cam hung » cac chung, cam nang, van hung
san toan » van toan, dan toan, manh toan
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: hoc ((nhieu tang) or (nhiet nang)) - thanh trung ((cam dung) OR (cam hung)) trong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nhieu tang) OR (nhiet nang)) - thanh trung ((cam dung) OR (cam hung)) trong san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((nhieu tang) or (nhiet nang)) - thanh trung ((cam dung) OR (cam hung)) trong san toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((nhieu tang) or (nhiet nang)) - thanh trung ((cam dung) OR (cam hung)) trong san toan ban*.