Perhaps you should try some spelling variations:
thanh vai » thanh van, thanh tai, thanh oai
thanh hai » thanh phan, thanh hoa, thanh san
hoc sach » hoc sinh, hoc cac, hoc anh
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
va cam » va cac, va cao, va cai
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky dang ma hoi. hieu ((va cam) OR (va cham)) xuc va ((thanh vai) or (thanh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky dang ma hoi. hieu ((va cam) OR (va cham)) xuc va ((thanh vai) OR (thanh hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky dang ma hoi. hieu ((va cam) OR (va cham)) xuc va ((thanh vai) or (thanh hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky dang ma hoi. hieu ((va cam) OR (va cham)) xuc va ((thanh vai) or (thanh hai)) cua tre*.