Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
hanh ve » hanh vi, hanh va, hanh kem
xuc van » duc van, luc van, vuc van
hieu va » lieu va, hieu qua
su tien » su kien, su hien, tu tieng
vu nang » vuc nang, va nang, v nang
vu dang » su dang, vu quang, cua dang
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, 5 hoi
ve su » va su

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 ((vu nang) OR (vu dang)) ((x hoi) OR (x ho)). hieu va cam xuc van hanh ve su tien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((vu nang) OR (vu dang)) ((x hoi) or (x ho)). hieu va cam xuc van hanh ve su tien~".
• Adding a wildcard symbol may retrieve word variants: thu sach ((vu nang) OR (vu dang)) ((x hoi) or (x ho)). hieu va cam xuc van hanh ve su tien*.