Perhaps you should try some spelling variations:
advanced courses » advanced course, advanced countries, advanced classes
advanced cases » advanced care, advanced class, advanced cancers
city barcelona » die barcelona, life barcelona, view barcelona
crm barcelona » from barcelona, pers barcelona, wism barcelona

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((advanced courses) OR (advanced cases)) in mathematics - ((crm barcelona) OR (city barcelona)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((advanced courses) OR (advanced cases)) in mathematics - ((crm barcelona) or (city barcelona))".
• Adding a wildcard symbol may retrieve word variants: ((advanced courses) OR (advanced cases)) in mathematics - ((crm barcelona) or (city barcelona))*.