Perhaps you should try some spelling variations:
binh voi » binh hoi, minh voi, tinh voi
so sach » bo sach, co sach, hoc sach
cac luc » cau luc, coc luc, cac nuoc
tinh vi » trinh vi, tinh voi, tinh va
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
luc va » duc va, tuc va, loc va
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) OR (so sanh)) ky nang xa hoi. hieu ve cac luc va ((tinh vi) or (binh voi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ky nang xa hoi. hieu ve cac luc va ((tinh vi) OR (binh voi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) ky nang xa hoi. hieu ve cac luc va ((tinh vi) or (binh voi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (so sanh)) ky nang xa hoi. hieu ve cac luc va ((tinh vi) or (binh voi)) cua tre*.