Perhaps you should try some spelling variations:
"modified quadratic optimization algorithm" » "modified static optimization algorithm", "modified quadratic optimization algorithms", "modified quadratic optimisation algorithm", "modified quadratic estimation algorithm"
"modified adaptive convolution algorithms" » "modified adaptive evolution algorithm", "modified adaptive solution algorithm", "modified adaptive construction algorithms", "modified adaptive ventilation algorithms", "modified passive convolution algorithms"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified quadratic optimization algorithm\") OR (\"modified adaptive convolution algorithms\"))~".
• Removing quotes may allow a broader search: (( modified quadratic optimization algorithm ) OR ( modified adaptive convolution algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified quadratic optimization algorithm") OR ("modified adaptive convolution algorithms"))*.