Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
xuan trong » xuan truong, quan trong, xuan trung
hoc chieu » hoc thieu, ho chieu, hoc hien
hanh tran » hanh trang, thanh tran, hanh tram
tran xuan » tran quang, tran van
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh tran xuan trong ((cong ban) OR (cong san)) than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh tran xuan trong ((cong ban) OR (cong san)) than cau".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh tran xuan trong ((cong ban) OR (cong san)) than cau*.