Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
thang ca » thang cua, hang ca, tang ca
ca thang » cau thang, ca tang, ca chang
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan cau » 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: hoc hieu manh - cang thang ca thang ((cong dong) or (((cong tan) or (cong tac)))) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - cang thang ca thang ((cong dong) OR (((cong tan) OR (cong tac)))) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - cang thang ca thang ((cong dong) or (((cong tan) or (cong tac)))) toan cau*.