Perhaps you should try some spelling variations:
"modified notion optimization algorithms" » "modified notion optimisation algorithm", "modified notion estimation algorithms", "modified notion estimation algorithm", "modified network optimization algorithms", "modified policy optimization algorithms", "modified allocation optimization algorithms"
"powder using search algorithm" » "powder using source algorithm", "code using search algorithm", "boiler using search algorithm", "model using search algorithm", "powder using egarch algorithm", "powder nursing research algorithm", "powder using servo algorithm"

Try widening your search to All Fields.

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