Perhaps you should try some spelling variations:
"recursos minerales" » "recursos naturales"
"arts generales" » "cortes generales", "gastos generales", "cargos generales", "art generales", "arte generales", "parte generales"
"art generales" » "art general", "arte general", "y generales"
"arts general" » "art general", "arte general", "parte general"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("arts generales") or ("art generales"))) or ("recursos minerales"))) or ("arts general"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("arts generales") OR ("art generales"))) OR ("recursos minerales"))) OR ("arts general"))*.
• Removing quotes may allow a broader search: (((((( arts generales ) or ( art generales ))) or ( recursos minerales ))) or ( arts general ))*.