Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van chat » cao chat
tang xa » trang xa, tang ma, lang xa
van cau » van dau, van hau, toan cau
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
va dinh » van dinh, va kinh, va tinh
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu 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: thu sach ky tang xa hoi. hieu ((van cau) OR (van chat)) luc va dinh ((di cua) OR (de cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky tang xa hoi. hieu ((van cau) or (van chat)) luc va dinh ((di cua) OR (de cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: thu sach ky tang xa hoi. hieu ((van cau) or (van chat)) luc va dinh ((di cua) OR (de cua)) tre*.