Perhaps you should try some spelling variations:
"psychology spain studies." » "sociology spain studies.", "psychology latin studies.", "psychology social studies.", "psychology spain asturias.", "psychology spain sources.", "psychology pace studies."
"psychology case studies." » "psychology latin studies."
"psychology car estudios." » "psychology early estudios.", "psychology peru estudios.", "psychology _ estudios.", "psychology c estudios.", "psychology a estudios.", "psychology sur estudios."

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: (("psychology car estudios.") or ((("psychology case studies.") OR ("psychology spain studies."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("psychology car estudios.") OR ((("psychology case studies.") OR ("psychology spain studies.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"psychology car estudios.\") or (((\"psychology case studies.\") OR (\"psychology spain studies.\"))))".
• Removing quotes may allow a broader search: (( psychology car estudios. ) or ((( psychology case studies. ) OR ( psychology spain studies. )))).
• Adding a wildcard symbol may retrieve word variants: (("psychology car estudios.") or ((("psychology case studies.") OR ("psychology spain studies."))))*.