Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
cac luc » cau luc, coc luc, cac nuoc
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
van hoc » van hoa
van hoi » van hoa, van hoe, van loi
ky lang » ky nang, ky dang, ky tang
ca cua » co cua
ve cac » va cac, vien cac

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: vu sach ky lang ((van hoi) OR (van hoc)). hieu ve cac luc ((gia thanh) OR (va tinh)) ca cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky lang ((van hoi) OR (van hoc)). hieu ve cac luc ((gia thanh) or (va tinh)) ca cua tre~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang ((van hoi) OR (van hoc)). hieu ve cac luc ((gia thanh) or (va tinh)) ca cua tre*.