Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong manh » cong danh, duong manh, cong thanh
hoc hieu » hoc thieu, hoc hien, doc hieu
van hoan » van hoang, van hoa, van toan
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
va hang » van hang, va nang, va lang

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 - hanh trinh ((va hang) or (van hoan)) cong manh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh trinh ((va hang) OR (van hoan)) cong manh ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh trinh ((va hang) or (van hoan)) cong manh ((toan cau) or (toan ban))*.