Perhaps you should try some spelling variations:
"data modeling algorithm" » "data making algorithm" (Expand Search), "data modelling algorithm" (Expand Search), "data models algorithm" (Expand Search)
"present study algorithm" » "present wsindy algorithm" (Expand Search), "present td3 algorithm" (Expand Search), "present seu algorithm" (Expand Search)
"element ore algorithms" » "element tree algorithms" (Expand Search), "element art algorithms" (Expand Search), "element rl algorithms" (Expand Search), "element te algorithms" (Expand Search), "element fbe algorithms" (Expand Search), "element ree algorithms" (Expand Search)

Try widening your search to All Fields.

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