Perhaps you should try some spelling variations:
administrative crisis » administrativa tesis, administrativa analisis, administrative activity
administrative claim » administrative law, administrative act, administrativa caso
economicas 41 » economica 41, economicas 46, economicas 61
economicas 4 » economicas 46, economicas 9, economicas a
economicas y » economicos y

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

• Performing a fuzzy search may retrieve terms with similar spellings: general ((administrative crisis) or (administrative claim)) ((((economicas 4) OR (economicas 41))) or (economicas y)) derechos~.
• If you are trying to use Boolean operators, they must be ALL CAPS: general ((administrative crisis) OR (administrative claim)) ((((economicas 4) OR (economicas 41))) OR (economicas y)) derechos.
• The words AND, OR and NOT may confuse the search; try adding quotes: "general ((administrative crisis) or (administrative claim)) ((((economicas 4) OR (economicas 41))) or (economicas y)) derechos".
• Adding a wildcard symbol may retrieve word variants: general ((administrative crisis) or (administrative claim)) ((((economicas 4) OR (economicas 41))) or (economicas y)) derechos*.