Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh va » hanh va, thanh ha, thanh ve
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
cua tre » cua te, cuu tre, cua triet
chat o » chat co, chat bo, chat vo
o gia » ho gia, co gia, do gia

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 ((xa hoi) or (x ho)). hieu va chat o gia ((thanh va) OR (thanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((xa hoi) OR (x ho)). hieu va chat o gia ((thanh va) OR (thanh van)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang ((xa hoi) or (x ho)). hieu va chat o gia ((thanh va) OR (thanh van)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((xa hoi) or (x ho)). hieu va chat o gia ((thanh va) OR (thanh van)) cua tre*.