Perhaps you should try some spelling variations:
hanh vai » hanh va, hanh tai, hanh voi
hanh van » thanh van, khanh van, hanh va
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
cac vo » cac co, cac vi, cac bo

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

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