Perhaps you should try some spelling variations:
"effects sampling algorithm" » "effects making algorithm" (Expand Search), "effects modeling algorithm" (Expand Search), "effects mining algorithm" (Expand Search), "effects along algorithm" (Expand Search), "effects arising algorithm" (Expand Search)
"present model algorithm" » "present novel algorithm" (Expand Search), "present modbo algorithm" (Expand Search), "present modeling algorithm" (Expand Search), "element model algorithm" (Expand Search), "rodent model algorithm" (Expand Search)
"effects using algorithm" » "effects using algorithms" (Expand Search), "effects routing algorithm" (Expand Search), "effects fusion algorithm" (Expand Search), "events using algorithm" (Expand Search)

Try widening your search to All Fields.

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