Perhaps you should try some spelling variations:
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, mot chieu
dai thong » dai tuong, dai hong, dai thang
ho chieu » theo chieu, hoc thieu, mot chieu
tung dai » trung dai, tuong dai, tung dan
cong san » cong tac
toan cao » toan ban, toan tap

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 tung dai thong ((huong dan) or (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) sach - thanh tung dai thong ((huong dan) OR (cong san)) toan cao.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) sach - thanh tung dai thong ((huong dan) or (cong san)) toan cao*.