Perhaps you should try some spelling variations:
"coder arduino firefly algorithm based" » "con arduino firefly algorithm based" (Expand search), "ide arduino firefly algorithm based" (Expand search), "solar arduino firefly algorithm based" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons python python programming" (Expand search), "rpa python python python programming" (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder arduino firefly algorithm based\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder arduino firefly algorithm based ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder arduino firefly algorithm based") OR ("api python python python programming"))*.