Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
va kinh » va tinh, qua kinh
vai cua » dai cua, hai cua, lai cua
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de 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: so sach y ((nang xa) OR (nang x)) hoi. hieu va cam xuc va kinh ((vai cua) OR (di cua)) viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((nang xa) OR (nang x)) hoi. hieu va cam xuc va kinh ((vai cua) or (di cua)) viet~".
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang xa) OR (nang x)) hoi. hieu va cam xuc va kinh ((vai cua) or (di cua)) viet*.