Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
canh manh » lanh manh, canh tranh, cach mang
doc hieu » toc thieu, hoc thieu, hoc hien
manh cua » doanh cua, ban cua
cong van » cong vang, song van, cong tan
cong san » cong tac
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 (doc hieu)) sach - canh manh cua cong ((cong van) or (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doc hieu)) sach - canh manh cua cong ((cong van) OR (cong san)) toan cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doc hieu)) sach - canh manh cua cong ((cong van) or (cong san)) toan cau*.