Perhaps you should try some spelling variations:
"coder coding welsch algorithm optimization" » "coder coding search algorithm optimization" (Expand search), "coder coding rasch algorithm optimization" (Expand search), "coder coding search algorithms optimization" (Expand search), "modern coding welsch algorithm optimization" (Expand search), "color coding welsch algorithm optimization" (Expand search), "odor coding welsch algorithm optimization" (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 coding welsch algorithm optimization\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coding welsch algorithm optimization ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coding welsch algorithm optimization") OR ("api python python python programming"))*.