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