Perhaps you should try some spelling variations:
va hanh » van hanh, va thanh, va danh
qua cac » cua cac
sach ky » sac ky, sach ty, sach kem
qua cam » qua cham, qua ca, qua cai
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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 ky) or (sach y)) nang ma hoi. hieu ((qua cam) or (qua cac)) xuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) nang ma hoi. hieu ((qua cam) OR (qua cac)) xuc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach y)) nang ma hoi. hieu ((qua cam) or (qua cac)) xuc va hanh vi cua tre*.