Perhaps you should try some spelling variations:
"modified objective estimation algorithms" » "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective approximation algorithms", "modified objective allocation algorithms"
"modified fire estimation algorithm" » "modified pose estimation algorithm", "modified risk estimation algorithm", "modified sphere estimation algorithm", "modified seird estimation algorithm", "modified bi1 estimation algorithm", "modified male estimation algorithm"

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