Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
hanh vai » hanh vi, hanh va, hanh van
cua tre » cua te, cuu tre, cua triet
tuc ban » thuc ban, truc ban, tu ban
hai tuc » thai tuc, hai cuc, thai thuc
van hai » van ha, van chat, van hanh
lang ha » long ha
lang xa » dang xay, lang van
hai ky » thai ky, hoi ky, hai ly
su hai » su tai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su hai ky ((lang xa) OR (lang ha)) hoi. hieu van hai tuc ban ((hanh vai) OR (hanh tai)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su hai ky ((lang xa) or (lang ha)) hoi. hieu van hai tuc ban ((hanh vai) OR (hanh tai)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: su hai ky ((lang xa) or (lang ha)) hoi. hieu van hai tuc ban ((hanh vai) OR (hanh tai)) cua tre*.