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