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

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 hoe)). hieu ve coc 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 hoe)). hieu ve coc 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 hoe)). hieu ve coc luc ((gia thanh) or (va tinh)) ca cua tre*.