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 xa » lang ha, dang xay, lang van
hieu va » hieu qua
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
cuu tre » cua tre, cau tren, cau treo
luc va » duc va, tuc va, loc va
kien » bien, vien, tien

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