Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
hoc hieu » hoc thieu, hoc hien, doc hieu
anh tang » anh bang, anh dang, anh nang
cua dang » cua ban
toan cau » toan cao, toan ban, toan tap
cua dan » cua ban, ca dan

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 - anh tang ((((cua dan) or (cua dang))) or (cua cong)) cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - anh tang ((((cua dan) OR (cua dang))) OR (cua cong)) cong manh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - anh tang ((((cua dan) or (cua dang))) or (cua cong)) cong manh toan cau*.