Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
tang van » dang van, hoang van, trong van
vai cua » dai cua, hai cua, lai cua
van cam » van nam, van lam, van cau
sach ky » sac ky, sach y, sach ty
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky ((lang xa) or (tang van)) hoi. hieu van cam ((xuc va) or (luc va)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((lang xa) OR (tang van)) hoi. hieu van cam ((xuc va) OR (luc va)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((lang xa) or (tang van)) hoi. hieu van cam ((xuc va) or (luc va)) hanh vai cua tre*.