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