Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"
"core forecasting mixed algorithm" » "core forecasting method algorithm", "core forecasting air algorithm", "_ forecasting mixed algorithm", "a forecasting mixed algorithm", "core forecasting driven algorithm", "core forecasting winner algorithm"

Try widening your search to All Fields.

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