Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
ve cua » le cua, de cua, ve cum
te cua » tue cua, le cua, de cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang xa hoi. hieu va cam ((xuc va) OR (luc va)) thanh ((ve cua) or (te cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. hieu va cam ((xuc va) OR (luc va)) thanh ((ve cua) OR (te cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. hieu va cam ((xuc va) OR (luc va)) thanh ((ve cua) or (te cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. hieu va cam ((xuc va) OR (luc va)) thanh ((ve cua) or (te cua)) tre*.