Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
bai cua » ban cua, dai cua, bai ca
hai cua » thai cua, dai cua, hoi cua
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
cam tu » cam thu, nam tu, dam 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: su sach y nang x hoi. hieu va cam tu ((van hanh) OR (van thanh)) ((bai cua) OR (hai cua)) viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. hieu va cam tu ((van hanh) OR (van thanh)) ((bai cua) or (hai cua)) viet~".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu va cam tu ((van hanh) OR (van thanh)) ((bai cua) or (hai cua)) viet*.