Perhaps you should try some spelling variations:
"modified motion optimization algorithms" » "modified motion optimisation algorithm", "modified motion estimation algorithms", "modified motion estimation algorithm", "modified policy optimization algorithms", "modified allocation optimization algorithms"
"modified learning methods algorithm" » "mobile learning methods algorithm", "modified caging methods algorithm", "modified nursing methods algorithm"

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