Perhaps you should try some spelling variations:
"modified invasive optimization algorithmssss" » "modified invasive optimization algorithms", "modified invasive optimisation algorithm", "modified invasive optimization algorithmsssss", "modified invasive optimisation algorithmssss", "modified invasive estimation algorithmssss", "modified passive optimization algorithmssss"
"modified bayesian optimization algorithm" » "modified bayesian optimization algorithms", "modified bayesian optimisation algorithm", "modified bayesian estimation algorithm"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified bayesian optimization algorithm") OR ("modified invasive optimization algorithmssss"))~.
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