Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
dang mam » dang nam, dang mau, dang mat
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
sach ty » sach y, sach tu, sach thu
dang ma » dang mau, dang mat, tang ma
hieu ve » hieu va, hieu van
cac hoc » cach hoc, cac hop, bac hoc
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty ((dang ma) or (dang mam)) hoi. hieu ve cac hoc va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((dang ma) OR (dang mam)) hoi. hieu ve cac hoc va thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((dang ma) or (dang mam)) hoi. hieu ve cac hoc va thanh vai cua tre*.