Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
tinh da » tinh va, tinh gia, tinh lao
sach ky » sac ky, sach y, sach ty
tinh de » sinh de, tinh he, minh de
va cam » va cham, va cac, va cao
ve cai » va cai, ve cac, ve tai

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 tang xa hoi. hieu ((ve cai) OR (va cam)) duc va ((tinh de) OR (tinh da)) cua vat~.
• Adding a wildcard symbol may retrieve word variants: vu sach ky tang xa hoi. hieu ((ve cai) or (va cam)) duc va ((tinh de) or (tinh da)) cua vat*.