Perhaps you should try some spelling variations:
cuoc luc » coc luc, duoc lac, duoc luu
su sach » so sach, vu sach
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
va tinh » may tinh
vai cua » dai cua, hai cua, lai cua
luc va » duc va, tuc va, loc va
vi cua » di cua
_ dan » _ dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ky dang) or (_ dan)) xa hoi. hieu va cuoc luc va tinh ((vi cua) or (vai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky dang) OR (_ dan)) xa hoi. hieu va cuoc luc va tinh ((vi cua) OR (vai cua)) viet.
• Adding a wildcard symbol may retrieve word variants: su sach ((ky dang) or (_ dan)) xa hoi. hieu va cuoc luc va tinh ((vi cua) or (vai cua)) viet*.