Perhaps you should try some spelling variations:
"image modeling algorithm" » "image making algorithm" (Expand Search), "age modeling algorithm" (Expand Search), "climate modeling algorithm" (Expand Search), "case modeling algorithm" (Expand Search)
"element method algorithm" » "element network algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mean algorithm" (Expand Search)
"prevalence data algorithm" » "prevalence rate algorithm" (Expand Search), "prevalence rates algorithm" (Expand Search), "prevalence ratio algorithm" (Expand Search), "prevalence data algorithms" (Expand Search), "prevalence update algorithm" (Expand Search), "prevalence atlas algorithm" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("image modeling algorithm") OR ((("element method algorithm") OR ("prevalence data algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"image modeling algorithm\") OR (((\"element method algorithm\") OR (\"prevalence data algorithm\"))))".
• Removing quotes may allow a broader search: (( image modeling algorithm ) OR ((( element method algorithm ) OR ( prevalence data algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("image modeling algorithm") OR ((("element method algorithm") OR ("prevalence data algorithm"))))*.