Perhaps you should try some spelling variations:
"modified coverage approximation algorithms" » "modified average approximation algorithms"
"modified thermal regulation algorithm" » "modified thermal evolution algorithm", "modified thermal predation algorithm", "modified thermal estimation algorithm", "modified thermal degradation algorithm", "modified legal regulation 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 coverage approximation algorithms") OR ("modified thermal regulation algorithm"))~.
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