Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
van hanh » van thanh, ban hanh, van anh
hoc sach » hoc sinh, hoc cac, hoc anh
nang cho » nang chon, ngang cho, nang cao
vien cac » vien bach, vien dai, vien da
xuc van » duc van, luc van, vuc van
cho hoc » co hoc, khoa hoc
ty nang » ky nang, ty xang, ty hang
cua cau » cua cac, cua chu, cua cay
ve cac » va 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) OR (hoc sach)) ty nang cho hoc. hieu ((ve cac) OR (vien cac)) xuc van hanh vi cua cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) ty nang cho hoc. hieu ((ve cac) OR (vien cac)) xuc van hanh vi cua cau~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ty nang cho hoc. hieu ((ve cac) OR (vien cac)) xuc van hanh vi cua cau*.