Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu cua » hieu qua, dieu cua, bieu cua
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
ve triet » va trien, su triet
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, ma hoa, me hoi
vai ve » va ve, dai ve, vai va

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang ((ma hoi) OR (xa hoi)). hieu cua cac xuc van hanh vai ve triet~".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ((ma hoi) OR (xa hoi)). hieu cua cac xuc van hanh vai ve triet*.