Perhaps you should try some spelling variations:
"current modeling algorithm" » "current scheduling algorithm" (Expand Search), "agent modeling algorithm" (Expand Search), "event modeling algorithm" (Expand Search)
"element mesh algorithm" » "element deer algorithm" (Expand Search), "element search algorithm" (Expand Search), "elements mesh algorithm" (Expand Search)
"element tree algorithms" » "elements tree algorithms" (Expand Search), "element three algorithms" (Expand Search), "element free algorithms" (Expand Search)

Try widening your search to All Fields.

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