Perhaps you should try some spelling variations:
"modified adamverage approximation algorithms" » "modified average approximation algorithms", "modified _damverage approximation algorithms", "modified dfdamverage approximation algorithms", "modified adamdamverage approximation algorithms"
"modified a predators algorithm" » "modified a predation algorithm", "modified _ predators algorithm", "modified df predators algorithm", "modified adam predators algorithm"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified adamverage approximation algorithms") OR ("modified a predators algorithm"))~.
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