Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh dai » thanh hai, thanh tai, thanh dat
lang van » dang van, tang van, hoang van
hoc sach » hoc sinh, hoc cac, hoc anh
hieu ve » hieu va, hieu van
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay
ve tam » ve tac, ve tai, va tam
tam tu » nam tu, cam tu, dam tu
tu van » tu va

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) or (hoc sach)) tay ((lang xa) or (lang van)) hoi. hieu ve tam tu van thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) tay ((lang xa) OR (lang van)) hoi. hieu ve tam tu van thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) tay ((lang xa) or (lang van)) hoi. hieu ve tam tu van thanh dai cua tre*.