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 » su viet, su tien
nang ma » tang ma, sang ma, nang cao
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, xa hoi, ma hoa

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. hieu cua cac xuc van hanh vai ((ve triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ma hoi. hieu cua cac xuc van hanh vai ((ve triet) OR (su triet))*.