Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
cuc ban » cua ban, cac ban, cuu ban
cuu san » cuu van, cua san, cuu ban
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, 5 hoi
d cuu » _ cuu

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 y nang ((x hoi) OR (x ho)). hieu ve cac ((cuc ban) OR (cuu san)) anh d cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((x hoi) OR (x ho)). hieu ve cac ((cuc ban) or (cuu san)) anh d cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((x hoi) OR (x ho)). hieu ve cac ((cuc ban) or (cuu san)) anh d cuu tre*.