Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach va » sach xa, sach ha, sach dao
hang di » hang doi, hang vi, hang dien
hanh di » hanh vi, hanh de, danh di
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va nang » van nang, da nang, cam nang
xuc va » duc va, tuc va, xac va
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va

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

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