Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
trung dap » trung cap, trung dai, trung lap
trung dam » trung tam, trung dai, trong dam
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau

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