Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
xang cho » sang cho, hang cho, tang cho
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach tu, sach thu
cho hoc » co hoc, khoa hoc
xuc van » duc van, luc van, vuc van
cua cau » cua cac, cua chu, cua cay
ve cai » va cai, ve tai, ve cau
ve cac » va cac, vien cac
vi cua » vai cua, di cua

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 ty xang cho hoc. hieu ((ve cai) or (ve cac)) xuc van hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty xang cho hoc. hieu ((ve cai) OR (ve cac)) xuc van hanh vi cua cau*.