Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van nang » van quang, van ban, van dong
nang tuc » nang thuc, nang luc, nang tu
hanh vai » hanh va, hanh tai, hanh van
tu sach » thu sach, su sach, te sach
sach va » sach xa, sach ha, sach dao
va nang » da nang, cam nang, kha nang
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

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 van nang tuc xa ((hanh vai) OR (hanh vi)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach va nang xa hoi. hieu van nang tuc xa ((hanh vai) OR (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach va nang xa hoi. hieu van nang tuc xa ((hanh vai) OR (hanh vi)) cua tre*.