Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh tai, hanh van
te sach » toc sach
hanh va » hang va, hanh vi
cac tac » cac toc, cac bac, cac dac
sach lo » sach dao, sach doi, sach hoi
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
tac va » tac da, tac xa, tuc va
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach lo ((nang x) or (nang ma)) hoi. hieu ve cac tac va ((hanh vai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach lo ((nang x) OR (nang ma)) hoi. hieu ve cac tac va ((hanh vai) OR (hanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach lo ((nang x) or (nang ma)) hoi. hieu ve cac tac va ((hanh vai) or (hanh va)) cua tre*.