Perhaps you should try some spelling variations:
"client modeling algorithm" » "client scheduling algorithm" (Expand Search), "agent modeling algorithm" (Expand Search), "event modeling algorithm" (Expand Search)
"elements rf algorithm" » "elements rd algorithm" (Expand Search), "elements _ algorithms" (Expand Search), "elements _ algorithm" (Expand Search)
"element method algorithms" » "element methods algorithms" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("client modeling algorithm") OR ((("element method algorithms") OR ("elements rf algorithm"))))~.
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• Removing quotes may allow a broader search: (( client modeling algorithm ) OR ((( element method algorithms ) OR ( elements rf algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("client modeling algorithm") OR ((("element method algorithms") OR ("elements rf algorithm"))))*.