Perhaps you should try some spelling variations:
su sach » so sach, vu sach
so sanh » do sanh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
hac tuc » thac toc, thai tuc
xa hanh » xa thanh, xa khanh, va hanh
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
va hac » van hac, va khac, va cac
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) or (so sanh)) v nang xa hoi. hieu va hac tuc xa hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) v nang xa hoi. hieu va hac tuc xa hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) v nang xa hoi. hieu va hac tuc xa hanh vi cua tre*.