Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh tai, hanh van
cong van » cong vang, cong san, song van
cac cong » cua cong
te sach » toc sach
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
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 y ((nang xa) or (nang ma)) hoi. hieu ve cac cong van ((hanh vai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (nang ma)) hoi. hieu ve cac cong van ((hanh vai) OR (hanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (nang ma)) hoi. hieu ve cac cong van ((hanh vai) or (hanh va)) cua tre*.