Perhaps you should try some spelling variations:
"modified invasive optimisation algorithms" » "modified invasive optimization algorithms", "modified invasive estimation algorithms", "modified invasive estimation algorithm", "modified invasive optimization algorithmss", "modified invasive estimation algorithmss", "modified passive optimisation algorithms"
"modified caging optimisation algorithm" » "modified caging optimization algorithms", "modified caging estimation algorithm", "modified caging estimation algorithms", "modified staffing optimization algorithm"

You may be able to get more results by adjusting your search query.

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