Perhaps you should try some spelling variations:
"digitalia book collection: el viaje loco." » "digitalia ebook collection: el viaje loco.", "digitalia book collecting: el viaje loco.", "digitalia book collectors: el viaje loco.", "digitalia book collection: el viaje los.", "digitalia book collection: el viaje tomo."
"digitalia book collection: el viaje como." » "digitalia ebook collection: el viaje como.", "digitalia book collecting: el viaje como.", "digitalia book collectors: el viaje como.", "digitalia book collection: el viaje com."

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: (("digitalia book collection: el viaje loco.") OR ("digitalia book collection: el viaje como."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"digitalia book collection: el viaje loco.\") OR (\"digitalia book collection: el viaje como.\"))".
• Removing quotes may allow a broader search: (( digitalia book collection: el viaje loco. ) OR ( digitalia book collection: el viaje como. )).
• Adding a wildcard symbol may retrieve word variants: (("digitalia book collection: el viaje loco.") OR ("digitalia book collection: el viaje como."))*.