Perhaps you should try some spelling variations:
thanh trung » thanh tung
doi chieu » doc hieu, doi chi, mot chieu
dung cong » dung trong
van thanh » ban thanh, van tuan
ho chieu » theo chieu, hoc thieu, mot chieu
trung ap » trung cap, trung lap, trung tam
dan toan » van toan, dan than, manh toan
ap dung » xay dung, van dung

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 (ho chieu)) sach - thanh trung ap dung cong ((dan toan) or (van thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) sach - thanh trung ap dung cong ((dan toan) OR (van thanh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (ho chieu)) sach - thanh trung ap dung cong ((dan toan) or (van thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (ho chieu)) sach - thanh trung ap dung cong ((dan toan) or (van thanh)) cau*.