Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
tuong va » truong va, thuong va, luong va
tan toan » tan tran, tap toan, dan toan
van toan » van tuan, van tan, van thanh

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) or (toc thieu)) xanh - thanh tuong va nhung cong ((tan toan) OR (van toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) xanh - thanh tuong va nhung cong ((tan toan) OR (van toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (toc thieu)) xanh - thanh tuong va nhung cong ((tan toan) OR (van toan)) cao".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) xanh - thanh tuong va nhung cong ((tan toan) OR (van toan)) cao*.