Perhaps you should try some spelling variations:
"la poblacion de euskadi frente a de covid-19" » "la poblacion de euskadi treinta a de covid-19" (Expand Search), "la poblacion de euskadi ante a de covid-19" (Expand Search), "la anulacion de euskadi frente a de covid-19" (Expand Search), "la poblacion de euskadi frente a la covid-19" (Expand Search), "la poblacion de euskadi frente 1a de covid-19" (Expand Search), "la poblacion de euskadi frente y de covid-19" (Expand Search), "la poblacion de euskadi frente 5 de covid-19" (Expand Search)
"la poblacion de euskadi frente a del covid-19" » "la poblacion de euskadi treinta a del covid-19" (Expand Search), "la poblacion de euskadi ante a del covid-19" (Expand Search), "la anulacion de euskadi frente a del covid-19" (Expand Search), "la poblacion de euskadi frente y del covid-19" (Expand Search), "la poblacion de euskadi frente o del covid-19" (Expand Search), "la poblacion de euskadi frente 1 del covid-19" (Expand Search), "la poblacion de euskadi frente 1a del covid-19" (Expand Search), "la poblacion de euskadi frente 5 del covid-19" (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("la poblacion de euskadi frente a de covid-19") OR ("la poblacion de euskadi frente a del covid-19"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"la poblacion de euskadi frente a de covid-19\") OR (\"la poblacion de euskadi frente a del covid-19\"))".
• Removing quotes may allow a broader search: (( la poblacion de euskadi frente a de covid-19 ) OR ( la poblacion de euskadi frente a del covid-19 )).
• Adding a wildcard symbol may retrieve word variants: (("la poblacion de euskadi frente a de covid-19") OR ("la poblacion de euskadi frente a del covid-19"))*.