Perhaps you should try some spelling variations:
"post modeling algorithm" » "post making algorithm" (Expand Search), "best modeling algorithm" (Expand Search), "forest modeling algorithm" (Expand Search), "joint modeling algorithm" (Expand Search)
"element method algorithms" » "element two algorithms" (Expand Search), "element both algorithms" (Expand Search), "element other algorithms" (Expand Search)
"element tree algorithms" » "element three algorithms" (Expand Search), "element art algorithms" (Expand Search), "element two algorithms" (Expand Search), "element ree algorithms" (Expand Search), "element te algorithms" (Expand Search), "element ore algorithms" (Expand Search)

Try widening your search to All Fields.

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