Perhaps you should try some spelling variations:
"coder _ routing algorithms complexity" » "coder _ routing algorithmic complexity" (Expand search), "coder _ routing algorithm complexity" (Expand search), "coder _ clustering algorithms complexity" (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), "manim 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 _ routing algorithms complexity\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder _ routing algorithms complexity ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder _ routing algorithms complexity") OR ("api python python python programming"))*.