Perhaps you should try some spelling variations:
hanh vii » hanh voi, hanh va, hanh noi
sach hoi » sach doi, sach moi, cach thoi
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va

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 hoi ((nang xa) or (tang ma)) hoi. hieu va cam xuc va ((hanh vii) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi ((nang xa) OR (tang ma)) hoi. hieu va cam xuc va ((hanh vii) OR (hanh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi ((nang xa) or (tang ma)) hoi. hieu va cam xuc va ((hanh vii) or (hanh vi)) cua tre*.