Perhaps you should try some spelling variations:
un misterio » el misterio (Expand Search)
"Un misterio de resolver artritis idiopática juvenil" » "Un misterio del resolver artritis idiopática juvenil" (Expand Search), "Un ministerio de resolver artritis idiopática juvenil" (Expand Search), "Un magisterio de resolver artritis idiopática juvenil" (Expand Search)
"Un misterio de resolver gastritis idiopática juvenil" » "Un misterio del resolver gastritis idiopática juvenil" (Expand Search), "Un ministerio de resolver gastritis idiopática juvenil" (Expand Search), "Un magisterio de resolver gastritis idiopática juvenil" (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: (("Un misterio de resolver artritis idiopática juvenil") OR ("Un misterio de resolver gastritis idiopática juvenil"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Un misterio de resolver artritis idiopática juvenil\") OR (\"Un misterio de resolver gastritis idiopática juvenil\"))".
• Removing quotes may allow a broader search: (( Un misterio de resolver artritis idiopática juvenil ) OR ( Un misterio de resolver gastritis idiopática juvenil )).
• Adding a wildcard symbol may retrieve word variants: (("Un misterio de resolver artritis idiopática juvenil") OR ("Un misterio de resolver gastritis idiopática juvenil"))*.