Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat soc » cham soc, chat hoc, chat doc
van hanh » van thanh, ban hanh, van anh
va danh » va dinh, va dan, va hanh
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: cu cao ky nang x hoi. hieu van chat soc ((van hanh) or (va danh)) di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cu cao ky nang x hoi. hieu van chat soc ((van hanh) OR (va danh)) di cuu tre.
• Adding a wildcard symbol may retrieve word variants: cu cao ky nang x hoi. hieu van chat soc ((van hanh) or (va danh)) di cuu tre*.