Perhaps you should try some spelling variations:
"cooperacion la solidaritat." » "cooperacion la solidaridad.", "cooperacion i solidaritat.", "cooperacion las solidaritat.", "cooperacion a solidaritat.", "cooperacion en solidaritat."
"cooperacion y solidaritat." » "cooperacion i solidaritat.", "cooperacion y solidaridad.", "cooperacion y solidarias."
"cooperacion y solidaria." » "cooperacion y solidaridad.", "cooperacion i solidaritat."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cooperacion y solidaritat.") OR ("cooperacion y solidaria."))) or ("cooperacion la solidaritat."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cooperacion y solidaritat.") OR ("cooperacion y solidaria."))) OR ("cooperacion la solidaritat.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"cooperacion y solidaritat.\") OR (\"cooperacion y solidaria.\"))) or (\"cooperacion la solidaritat.\"))".
• Removing quotes may allow a broader search: (((( cooperacion y solidaritat. ) OR ( cooperacion y solidaria. ))) or ( cooperacion la solidaritat. )).
• Adding a wildcard symbol may retrieve word variants: (((("cooperacion y solidaritat.") OR ("cooperacion y solidaria."))) or ("cooperacion la solidaritat."))*.