Perhaps you should try some spelling variations:
"modified based estimation algorithms" » "modified based estimation algorithm", "modified based optimization algorithms", "modified based optimisation algorithm", "modified pose estimation algorithms", "modified based investigation algorithms", "modified pulses estimation algorithms", "modified male estimation algorithms"
"modified objective allocation algorithm" » "modified objective estimation algorithm", "modified objective evolution algorithm", "modified objective predation algorithm"

You may be able to get more results by adjusting your search query.

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