Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cau triet » cau trieu, su triet, cua triet
chat soc » cham soc, chat hoc, chat doc
cau treo » cau theo, cau tren, cau trieu
van hoi » van hoc, van hoe, van loi
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
soc ban » hoc ban, coc ban, so ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang ((van hoi) or (van hoa)). hieu ve chat soc ban thanh san ((cau treo) or (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((van hoi) OR (van hoa)). hieu ve chat soc ban thanh san ((cau treo) OR (cau triet)).
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((van hoi) or (van hoa)). hieu ve chat soc ban thanh san ((cau treo) or (cau triet))*.