Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh tai, hanh van
tu sach » thu sach, su sach, te sach
sach ho » sach hoi, sach ha, sach lo
hanh va » hang va, hanh vi
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
ho nang » thi nang, kha nang, cao nang
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao

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 ho nang xa hoi. hieu ((va cam) OR (va cao)) thuc va ((hanh vai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ho nang xa hoi. hieu ((va cam) OR (va cao)) thuc va ((hanh vai) OR (hanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ho nang xa hoi. hieu ((va cam) OR (va cao)) thuc va ((hanh vai) or (hanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ho nang xa hoi. hieu ((va cam) OR (va cao)) thuc va ((hanh vai) or (hanh va)) cua tre*.