Perhaps you should try some spelling variations:
"coder introduction doi coding problem" » "cholera introduction doi coding problem" (Expand search), "contra introduction doi coding problem" (Expand search), "after introduction doi coding problem" (Expand search), "coder introduction to coding problem" (Expand search), "coder introduction of coding problem" (Expand search), "coder introduction on coding problem" (Expand search), "coder introduction doi coding problems" (Expand search), "coder introduction doi coping problem" (Expand search), "coder introduction doi loading problem" (Expand search), "coder introduction doi codi problem" (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 introduction doi coding problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder introduction doi coding problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder introduction doi coding problem") OR ("api python python python programming"))*.