Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
hieu vi » hieu voi, hieu va, hien vi
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
va cua » va chua, via cua, ca cua
cua te » cua tu
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: so sach ky nang x hoi. ((hieu vi) OR (hieu ve)) pham duc va hanh va cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang x hoi. ((hieu vi) OR (hieu ve)) pham duc va hanh va cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang x hoi. ((hieu vi) OR (hieu ve)) pham duc va hanh va cua te*.