Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
doi chieu » doc hieu, doi chi, mot chieu
dang cong » dung cong
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, hoc thieu, mot chieu
trinh vi » trinh va, trinh ve, trinh viet
van toan » van tuan, van tan, van thanh
vi dang » vu dang, va dang, vi dong

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)) xanh - canh trinh vi dang cong ((van toan) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - canh trinh vi dang cong ((van toan) OR (manh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) xanh - canh trinh vi dang cong ((van toan) or (manh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) xanh - canh trinh vi dang cong ((van toan) or (manh toan)) cau*.