Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh tai » thanh hai, doanh tai, thanh san
toc sach » hoc sach, doc sach, thuoc sach
thuc ban » thuoc ban, thuc dan, thu ban
cau thuc » cau truc, cuu thuc, can thuc
hieu van » hieu va, thien van, lieu va
van cau » van dau, van hau, van chat
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang ma hoi. hieu van cau thuc ban ((thanh tai) OR (thanh toan)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang ma hoi. hieu van cau thuc ban ((thanh tai) OR (thanh toan)) cuu tre*.