Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh tai, hanh van
sach hoi » sach doi, sach moi, cach thoi
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
xuc va » duc va, tuc va, luc va
ve cam » ve cham, ve cac, va cam

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