Perhaps you should try some spelling variations:
hanh vai » hanh va, hanh tai, hanh van
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cua te » cua tu
cac bo » bac bo, cac co
cac lo » cac lop, cac co, cac ho
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 ve ((cac lo) OR (cac bo)) va ((hanh vai) or (hanh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang x hoi. hieu ve ((cac lo) OR (cac bo)) va ((hanh vai) OR (hanh vi)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang x hoi. hieu ve ((cac lo) OR (cac bo)) va ((hanh vai) or (hanh vi)) cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang x hoi. hieu ve ((cac lo) OR (cac bo)) va ((hanh vai) or (hanh vi)) cua te*.