Perhaps you should try some spelling variations:
"modified notion optimization algorithms" » "modified notion estimation algorithms", "modified notion estimation algorithm", "modified notion optimized algorithms", "modified network optimization algorithms", "modified policy optimization algorithms", "modified allocation optimization algorithms"
"modified lighting optimisation algorithm" » "modified lighting estimation algorithm", "modified lighting estimation algorithms", "modified caging optimisation algorithm"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified lighting optimisation algorithm") OR ("modified notion optimization algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified lighting optimisation algorithm\") OR (\"modified notion optimization algorithms\"))*".
• Removing quotes may allow a broader search: (( modified lighting optimisation algorithm ) OR ( modified notion optimization algorithms ))*.