Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap
cac ban » cac dan, cac van, cac bai
can ban » van ban, toan ban

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

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