Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, anh trinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
canh tinh » hanh tinh, manh tinh, canh tranh
long doan » cong doan, dong doanh, rong doanh
hoc hieu » hoc thieu, hoc hien, doc hieu
va thang » van thang, va thanh, va thong
long dan » cong dan, nong dan, long van
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - ((canh trinh) or (canh tinh)) va thang ((long dan) OR (long doan)) chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((canh trinh) OR (canh tinh)) va thang ((long dan) OR (long doan)) chan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - ((canh trinh) or (canh tinh)) va thang ((long dan) OR (long doan)) chan cau*".