Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hoc sach » hoc sinh, hoc cac, hoc anh
tay lang » tai lang, tay tang, tay quang
te sach » toc sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
cam tu » cam thu, nam tu, dam tu
tu van » tu va
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua
ve cam » ve cham, ve cac, va cam

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 hoi. hieu ve cam tu van thanh ((di cua) OR (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) tay lang xa hoi. hieu ve cam tu van thanh ((di cua) OR (de cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (hoc sach)) tay lang xa hoi. hieu ve cam tu van thanh ((di cua) OR (de cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) tay lang xa hoi. hieu ve cam tu van thanh ((di cua) OR (de cua)) tre*.