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
duc van » duc va, duc tan, duc manh
cua cau » cua cac, cua chu, cua cay
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
ve cac » va cac, vien cac
vi cua » vai cua, di cua
ve cao » va cao, ve bao, ve co

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 xa hoi. hieu ((ve cao) OR (ve cac)) duc 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 xa hoi. hieu ((ve cao) or (ve cac)) duc van hanh vi cua cau~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (hoc sach)) ty nang xa hoi. hieu ((ve cao) or (ve cac)) duc van hanh vi cua cau*.