Perhaps you should try some spelling variations:
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"
"mapping forecasting air algorithm" » "mapping forecasting _ algorithm", "mapping forecasting mixed algorithm", "mapping forecasting our algorithm", "mapping forecasting adam algorithm", "mapping forecasting qspr algorithm"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("mapping forecasting air algorithm") or ("modified notion approximation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("mapping forecasting air algorithm") OR ("modified notion approximation algorithms")).
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