Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
xuc van » luc van, xuc ban, thuc van
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (so sach)) ky nang x hoi. hieu vu cham ((xuc van) OR (duc van)) anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (so sach)) ky nang x hoi. hieu vu cham ((xuc van) OR (duc van)) anh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cac) or (so sach)) ky nang x hoi. hieu vu cham ((xuc van) OR (duc van)) anh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (so sach)) ky nang x hoi. hieu vu cham ((xuc van) OR (duc van)) anh vi cua tre*.