Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
xang cho » sang cho, hang cho, tang cho
xuc van » duc van, luc van, xuc ban
cua cau » cua cac, cua cay, cua can
vuc van » duc van, luc van, thuc van
sach tu » sach thu, cach tu, sach ty
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
tu xang » ty xang, tu lang, tu quang
cua chu » sua chua
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: toc sach tu xang cho hoc. hieu ve cac ((xuc van) OR (vuc van)) hanh vi ((cua cau) or (cua chu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu xang cho hoc. hieu ve cac ((xuc van) OR (vuc van)) hanh vi ((cua cau) OR (cua chu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tu xang cho hoc. hieu ve cac ((xuc van) OR (vuc van)) hanh vi ((cua cau) or (cua chu))*".