Perhaps you should try some spelling variations:
thanh trung » thanh tung
khung cong » nhung cong, khung long, khung hoang
phung cong » nhung cong, phong cong, nhung chong
doi chieu » doc hieu, doi chi, mot chieu
trung dai » truong dai, truong dao, trung tam
ho chieu » theo chieu, hoc thieu, mot chieu
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

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