Perhaps you should try some spelling variations:
cuoc luc » coc luc, duoc lac, duoc luu
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
hieu va » lieu va, hieu qua
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
cua tre » cua te, cuu tre, cua triet
su tien » su kien, su hien, tu tieng
ha hoi » hoa hoi, ha noi, xa hoi
luc va » duc va, tuc va, loc va

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 lang ha hoi. hieu va cuoc luc va tinh vi ((cua tre) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky lang ha hoi. hieu va cuoc luc va tinh vi ((cua tre) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: so sach ky lang ha hoi. hieu va cuoc luc va tinh vi ((cua tre) or (su tien))*.