Perhaps you should try some spelling variations:
trung thanh » truong thanh
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung tam, tran tuan, truong thanh
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
tan thanh » tran thanh, tang thanh, toan thanh
tan than » tan tran, ban than, tam than

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 sach - thanh ((trung tuan) OR (trung thanh)) dung cong ((tan than) OR (tan thanh)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((trung tuan) or (trung thanh)) dung cong ((tan than) OR (tan thanh)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((trung tuan) or (trung thanh)) dung cong ((tan than) OR (tan thanh)) cau*.