Perhaps you should try some spelling variations:
canh thanh » canh tranh, danh thanh, anh thanh
doi chieu » doc hieu, doi chi, mot chieu
thanh can » thanh san, thanh van, thanh tan
ho chieu » theo chieu, hoc thieu, mot chieu
can bang » cao bang, can ban, van ban
cong dan » cong san, cong tan, cong dong
than cau » toan cau, phan cau, than cap

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) OR (doi chieu)) tinh - canh thanh can bang ((cong dan) or (huong dan)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) tinh - canh thanh can bang ((cong dan) OR (huong dan)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) tinh - canh thanh can bang ((cong dan) or (huong dan)) than cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) tinh - canh thanh can bang ((cong dan) or (huong dan)) than cau*.