Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach vuc » sach duoc, sach nuoc, sach truc
vuc nang » cuc nang, vu nang, chuc nang
hieu va » lieu va, hieu qua
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
hanh ve » hanh vi, hanh kem
hanh va » hang va, hanh vi
nang o » nang co, nang ho, nang ro
va cam » va cham, va cac, va cao
o hoi » co hoi, o hoc, o hai
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 vuc nang o hoi. hieu va cam ((xuc van) OR (duc van)) ((hanh ve) OR (hanh va)) su kien~.
• Adding a wildcard symbol may retrieve word variants: thu sach vuc nang o hoi. hieu va cam ((xuc van) or (duc van)) ((hanh ve) or (hanh va)) su kien*.