Perhaps you should try some spelling variations:
sach ky » sac ky, sach y, sach kem
va hanh » van hanh, va thanh, va danh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
sach ty » sach y, sach tu, sach thu
ve cam » ve cham, ve cac, va cam
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: tu ((sach ky) or (sach ty)) ((nang xa) or (nang x)) hoi. hieu ve cam duc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) ((nang xa) OR (nang x)) hoi. hieu ve cam duc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) ((nang xa) or (nang x)) hoi. hieu ve cam duc va hanh vi cua tre*.