Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh van » thanh san, thanh phan, thanh nhan
dieu tra » dieu tri, kiem tra, dieu cua
so sanh » do sanh
sanh ty » sach ty, canh tay
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
tra cac » tra cau, tri cac, tranh cac
cac tuc » cac toc, cac tu, cac tac
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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 ty lang xa hoi. dieu tra cac tuc va ((thanh toan) or (thanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ty lang xa hoi. dieu tra cac tuc va ((thanh toan) OR (thanh van)) cua tre.
• Adding a wildcard symbol may retrieve word variants: so sanh ty lang xa hoi. dieu tra cac tuc va ((thanh toan) or (thanh van)) cua tre*.