Perhaps you should try some spelling variations:
"problemas conflicto linguistico methodology." » "problemas conflicto linguistics methodology.", "problemas conflicto linguistica metodologia.", "problemas contacto linguistico methodology.", "fronteras conflicto linguistico methodology.", "problemas economicos linguistico methodology."
"proceso control sciences methodology." » "proceso control science methodology.", "proceso control sciences meteorology.", "proceso control science ethnology.", "proceso control civiles methodology.", "proceso control nociones methodology.", "process control sciences methodology.", "proceso contra sciences methodology.", "proceso contralos sciences methodology."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("problemas conflicto linguistico methodology.") or ("proceso control sciences methodology."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("problemas conflicto linguistico methodology.") OR ("proceso control sciences methodology.")).
• Removing quotes may allow a broader search: (( problemas conflicto linguistico methodology. ) or ( proceso control sciences methodology. )).
• Adding a wildcard symbol may retrieve word variants: (("problemas conflicto linguistico methodology.") or ("proceso control sciences methodology."))*.