Perhaps you should try some spelling variations:
"equations analysis" » "solutions analysis"
"functions analysis" » "function analysis", "solutions analysis"
"functional analysis" » "function analysis"

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