Perhaps you should try some spelling variations:
chat soc » cham soc, chat hoc, chat doc
hanh doi » thanh doi, hanh noi, hang doi
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
soc va » hoc va, loc va, doc va
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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 ((o hoi) or (x ho)). hieu ve chat soc va hanh doi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((o hoi) OR (x ho)). hieu ve chat soc va hanh doi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((o hoi) or (x ho)). hieu ve chat soc va hanh doi ((cua tre) or (cua te))*.