Perhaps you should try some spelling variations:
binh voi » binh hoi, minh voi, tinh voi
so sach » so sanh, bo sach, co sach
tinh vi » trinh vi, tinh voi, dinh vi
tinh va » tich va, trinh van, trinh vat
cac luc » cau luc, coc luc, cac nuoc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac

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

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