Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
vien cac » vien bach, vien dai, vien da
hoc sach » hoc sinh, hoc cac, hoc anh
ty nang » ky nang, ty xang, ty hang
cao hoc » co hoc, cho hoc, chat hoc
van anh » van thanh, tuan anh, van minh
xuc van » duc van, luc van, vuc van
anh vi » hanh vi, anh va, anh ve
ve cac » va 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) OR (hoc sach)) ty nang cao hoc. hieu ((ve cac) or (vien cac)) xuc van anh vi cua cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ty nang cao hoc. hieu ((ve cac) OR (vien cac)) xuc van anh vi cua cac*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) ty nang cao hoc. hieu ((ve cac) or (vien cac)) xuc van anh vi cua cac*".