Perhaps you should try some spelling variations:
"poole equation" » "people equation", "cole equation", "boolean equation"
"pole equation" » "cole equation", "people equation", "pol's equation", "poole equation", "polye equation", "polle equation"
"pol equation" » "pool equation", "poly equation", "poll equation"

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: (("pol equation") OR ((("pole equation") OR ("poole equation")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"pol equation\") or (((\"pole equation\") OR (\"poole equation\"))))".
• Removing quotes may allow a broader search: (( pol equation ) or ((( pole equation ) OR ( poole equation )))).
• Adding a wildcard symbol may retrieve word variants: (("pol equation") or ((("pole equation") OR ("poole equation"))))*.