Perhaps you should try some spelling variations:
"congreso del curso." » "congreso de curso.", "congresos e curso.", "congreso del cuerpo.", "congreso del discurso.", "congreso del recurso.", "congreso del cuarto."
"ingresos el curso." » "ingresos en curso.", "ingreso el curso.", "ingreso en curso.", "ingresos el recurso.", "ingresos el cuerpo.", "ingresos el cuarto."
"ingresos 1 curso." » "ingresos y curso.", "ingresos o curso.", "ingresos en curso.", "ingresos 2 curso.", "ingresos 3 curso.", "ingresos un curso."

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: (("congreso del curso.") or ((("ingresos 1 curso.") or ("ingresos el curso."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("congreso del curso.") OR ((("ingresos 1 curso.") OR ("ingresos el curso.")))).
• Removing quotes may allow a broader search: (( congreso del curso. ) or ((( ingresos 1 curso. ) or ( ingresos el curso. )))).
• Adding a wildcard symbol may retrieve word variants: (("congreso del curso.") or ((("ingresos 1 curso.") or ("ingresos el curso."))))*.