Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
hieu va » lieu va, hieu qua
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc manh, duc phan
hanh ve » hanh vi, hanh va, hanh kem
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho
ve su » va su
kien » bien, vien, tien

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