Perhaps you should try some spelling variations:
"modified objective estimation algorithmsss" » "modified objective estimation algorithm", "modified objective estimation algorithmss", "modified objective optimization algorithmsss", "modified objective optimisation algorithmss", "modified objective allocation algorithmsss"
"modified allocation estimation algorithms" » "modified allocation optimization algorithms", "modified motion estimation algorithms", "modified allocation estimation algorithm", "modified allocation optimisation algorithm"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified objective estimation algorithmsss\") OR (\"modified allocation estimation algorithms\"))~".
• Removing quotes may allow a broader search: (( modified objective estimation algorithmsss ) OR ( modified allocation estimation algorithms ))~.
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