Perhaps you should try some spelling variations:
thanh tien » thanh vien, thanh nien, thang tien
tien cua » trien cua, tiep cua, dien cua
so sanh » do sanh
tac ban » tai ban, tao ban, tay ban
cac ban » cac dan, cac van, can ban
sanh ky » hanh ky, sang ky, nganh ky
qua cac » cua cac
cua tre » cua te, cuu tre, cua triet
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ky nang ((x hoi) OR (o hoi)). hieu qua cac ((tac ban) or (cac ban)) thanh tien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky nang ((x hoi) OR (o hoi)). hieu qua cac ((tac ban) OR (cac ban)) thanh tien cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky nang ((x hoi) OR (o hoi)). hieu qua cac ((tac ban) or (cac ban)) thanh tien cua tre".
• Adding a wildcard symbol may retrieve word variants: so sanh ky nang ((x hoi) OR (o hoi)). hieu qua cac ((tac ban) or (cac ban)) thanh tien cua tre*.