Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
thu sach » tu sach, thuat sach, thuoc sach
vien cac » vien bach, vien dai, vien da
hanh hai » thanh hai, nhanh hai, hang hai
hai cua » thai cua, dai cua, hoi cua
y nang » ly nang, v nang, may nang
luc va » tuc va, loc va
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.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((y nang) or (ky nang)) x hoi. hieu vien cac ((luc va) or (duc va)) hanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (ky nang)) x hoi. hieu vien cac ((luc va) OR (duc va)) hanh hai cua te.
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (ky nang)) x hoi. hieu vien cac ((luc va) or (duc va)) hanh hai cua te*.