Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
dap nhung » va nhung, dap ung, cam nhung
vap nhung » va nhung, ve nhung, voi nhung
cong san » cong tac
than cua » nhan cua, thai cua, ban cua
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - thanh trung ((dap nhung) OR (vap nhung)) cong san ((than cua) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh trung ((dap nhung) OR (vap nhung)) cong san ((than cua) OR (khan cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh trung ((dap nhung) OR (vap nhung)) cong san ((than cua) or (khan cap))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh trung ((dap nhung) OR (vap nhung)) cong san ((than cua) or (khan cap))*.