Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
ty nang » ky nang, ty hang, ly nang
hieu va » lieu va, hieu qua
cam cuu » cham cuu, cap cuu
hanh di » hanh vi, hanh de, hang di
va cam » va cham, va cac, va cao
di cua » dai cua, doi cua, de cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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: thu sach ((ty nang) OR (ty xang)) x hoi. hieu va cam cuu van hanh di cua te~.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) or (ty xang)) x hoi. hieu va cam cuu van hanh di cua te*.