Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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 ((va cam) OR (va cao)) luc va thanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. hieu ((va cam) OR (va cao)) luc va thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach y nang xa hoi. hieu ((va cam) OR (va cao)) luc va thanh vi cua tre*.