Perhaps you should try some spelling variations:
"program implement" » "program implemented" (Expand Search), "program implementing" (Expand Search)
"model implementeding" » "model implementededing" (Expand Search), "model implementingeding" (Expand Search), "model implementing" (Expand Search), "model implemented" (Expand Search)
"program implementingededinged" » "program implementedingededinged" (Expand Search), "program implementingingededinged" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"program implement\") OR (((\"model implementeding\") OR (\"program implementingededinged\"))))~".
• Removing quotes may allow a broader search: (( program implement ) OR ((( model implementeding ) OR ( program implementingededinged ))))~.
• Adding a wildcard symbol may retrieve word variants: (("program implement") OR ((("model implementeding") OR ("program implementingededinged"))))*.