Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thi nang » thi cong, thi hanh
van hanh » van thanh, ban hanh, van anh
cho hoc » co hoc, khoa hoc
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
cua cau » cua cac, cua chu, cua cay
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((thi nang) OR (((ki nang) OR (ky nang)))) cho hoc. hieu ve cac xuc van hanh vi cua cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((thi nang) or (((ki nang) OR (ky nang)))) cho hoc. hieu ve cac xuc van hanh vi cua cau~".
• Adding a wildcard symbol may retrieve word variants: toc sach ((thi nang) or (((ki nang) OR (ky nang)))) cho hoc. hieu ve cac xuc van hanh vi cua cau*.