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