Perhaps you should try some spelling variations:
"la doctrina cristiana y su ensenanza OR y ensenanza " » "la doctrina cristiana y la ensenanza OR y ensenanza " (Expand Search), "la doctrina cristiana y de ensenanza OR y ensenanza " (Expand Search), "la doctrina cristiana y su ensenanza OR la ensenanza " (Expand Search), "la doctrina cristiana y su ensenanza OR de ensenanza " (Expand Search)
"la doctrina cristiana de su ensenanza OR y ensenanza " » "la doctrina cristiana de la ensenanza OR y ensenanza " (Expand Search), "la doctrina cristiana de de ensenanza OR y ensenanza " (Expand Search), "la doctrina cristina de su ensenanza OR y ensenanza " (Expand Search), "la doctrina cristiana de su ensenanza OR la ensenanza " (Expand Search), "la doctrina cristiana de su ensenanza OR de ensenanza " (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 doctrina cristiana y ((su ensenanza) OR (y ensenanza))") OR ("la doctrina cristiana de ((su ensenanza) OR (y ensenanza))"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"la doctrina cristiana y ((su ensenanza) OR (y ensenanza))\") OR (\"la doctrina cristiana de ((su ensenanza) OR (y ensenanza))\"))".
• Removing quotes may allow a broader search: (( la doctrina cristiana y ((su ensenanza) OR (y ensenanza)) ) OR ( la doctrina cristiana de ((su ensenanza) OR (y ensenanza)) )).
• Adding a wildcard symbol may retrieve word variants: (("la doctrina cristiana y ((su ensenanza) OR (y ensenanza))") OR ("la doctrina cristiana de ((su ensenanza) OR (y ensenanza))"))*.