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