Perhaps you should try some spelling variations:
"modified thermal variation algorithms" » "modified thermal estimation algorithms", "modified thermal vision algorithms", "modified thermal estimation algorithm", "modified thermal evaporation algorithms", "modified thermal activation algorithms", "modified thermal oxidation algorithms"
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"

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 thermal variation algorithms") OR ("modified notion approximation algorithms"))~.
• Removing quotes may allow a broader search: (( modified thermal variation algorithms ) or ( modified notion approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified thermal variation algorithms") or ("modified notion approximation algorithms"))*.