Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
cong cong » cong dong, trong cong, dung cong
thi hieu » thi chieu, thi hien, thi dieu
cong san » cong tac
san toan » van toan, dan toan, manh toan
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: ((doi chieu) or (thi hieu)) sang - ((hanh tranh) OR (hanh trinh)) cua cong cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (thi hieu)) sang - ((hanh tranh) OR (hanh trinh)) cua cong cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (thi hieu)) sang - ((hanh tranh) OR (hanh trinh)) cua cong cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (thi hieu)) sang - ((hanh tranh) OR (hanh trinh)) cua cong cong san toan cao*.