Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
dap nhung » vap nhung, va nhung, dap ung
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
than cua » nhan cua, thai cua, ban cua
khoan va » doan va, khoa ma, nhan va

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