Perhaps you should try some spelling variations:
"racial differentes situations" » "racial different situations", "racial difference equations", "crucial differences situations", "facial difference situations", "radial differential situations"
"social differences situations" » "social different situations", "social difference simulations", "social differences equations", "social preferences situations", "regional differences situations", "national differences situations"
"racial differences equation" » "racial differences equations", "racial differenced equations", "racial differences education", "regional differences equation", "facial differences equation", "social differences equation", "rational differences equation"
"racial difference equation" » "racial difference equations", "racial differential equation", "racial differential equations", "facial difference equation", "social difference equation", "rational difference equation"

Try widening your search to All Fields.

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("racial differentes situations") OR ("social differences situations"))) OR ((("racial difference equation") OR ("racial differences equation")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"racial differentes situations\") or (\"social differences situations\"))) or (((\"racial difference equation\") OR (\"racial differences equation\"))))".
• Removing quotes may allow a broader search: (((( racial differentes situations ) or ( social differences situations ))) or ((( racial difference equation ) OR ( racial differences equation )))).
• Adding a wildcard symbol may retrieve word variants: (((("racial differentes situations") or ("social differences situations"))) or ((("racial difference equation") OR ("racial differences equation"))))*.