Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong sang » cong san, cong vang, cong bang
cong lang » cong vang, cong luong, cong quang
ho chieu » theo chieu, hoc thieu, doi chieu
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
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: ho chieu sach - thanh ((trung va) OR (trung ha)) nhung ((cong sang) OR (cong lang)) than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((trung va) OR (trung ha)) nhung ((cong sang) OR (cong lang)) than cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung va) OR (trung ha)) nhung ((cong sang) OR (cong lang)) than cau*.