Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
tri cac » tri mac, tai cac, tri dac
tra cac » tra cau, tranh cac, tra chat
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
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 sach ty lang xa hoi. dieu ((tra cac) OR (tri cac)) tuc va ((thanh toan) or (nhan vien)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty lang xa hoi. dieu ((tra cac) OR (tri cac)) tuc va ((thanh toan) OR (nhan vien)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty lang xa hoi. dieu ((tra cac) OR (tri cac)) tuc va ((thanh toan) or (nhan vien)) cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ty lang xa hoi. dieu ((tra cac) OR (tri cac)) tuc va ((thanh toan) or (nhan vien)) cua tre*.