Perhaps you should try some spelling variations:
luat duoc » luat tuc
mai khoi » mai khoa, tai khoa, cac khoi
duoc may » duoc ma, duoc ly, hoc may
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
va luat » va thuat, vay luan, cua luat
tinh ca » tinh cao, tinh cua, tinh va
cua tre » cua te, cuu tre, cua triet
ca cua » co cua

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 ((xa hoi) or (mai khoi)). lieu va luat duoc may tinh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang ((xa hoi) OR (mai khoi)). lieu va luat duoc may tinh ca cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang ((xa hoi) or (mai khoi)). lieu va luat duoc may tinh ca cua tre*.