Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, tu cach
te sach » toc sach
vu nang » vuc nang, va nang, vu dang
xuc anh » duc anh, luc canh, suc manh
tuan va » toan va, luan va, quan va
va cao » va co, va dao, va bao
x hoi » xa hoi, o hoi, x ho
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: ((tu sach) OR (te sach)) vu nang x hoi. hieu ((va cao) OR (va cac)) xuc anh tuan va su kien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) vu nang x hoi. hieu ((va cao) or (va cac)) xuc anh tuan va su kien~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) vu nang x hoi. hieu ((va cao) or (va cac)) xuc anh tuan va su kien*.