Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
doi chieu » doc hieu, doi chi, ho chieu
canh ban » can ban, canh van, doanh ban
canh dan » canh van, sanh dan, thanh dan
dong san » cong san, dong bang, dong von
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (doi chieu)) sach - ((canh ban) OR (canh dan)) cua cong dong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doi chieu)) sach - ((canh ban) OR (canh dan)) cua cong dong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (doi chieu)) sach - ((canh ban) OR (canh dan)) cua cong dong san toan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doi chieu)) sach - ((canh ban) OR (canh dan)) cua cong dong san toan cau*.