Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac
lo van » le van, so van, do van
sai ky » sac ky

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 ky) or (sai ky)) nang ma hoi. hieu ve cac ((lo van) or (vo van)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sai ky)) nang ma hoi. hieu ve cac ((lo van) OR (vo van)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sai ky)) nang ma hoi. hieu ve cac ((lo van) or (vo van)) hanh vai cua tre*.