Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
va kinh » va tinh, qua kinh
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
vi cua » vai cua
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: thu sach v nang xa hoi. ((hieu ve) OR (hieu van)) pham duc va kinh ((vi cua) OR (di cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach v nang xa hoi. ((hieu ve) OR (hieu van)) pham duc va kinh ((vi cua) or (di cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: thu sach v nang xa hoi. ((hieu ve) OR (hieu van)) pham duc va kinh ((vi cua) or (di cua)) tre*.