Perhaps you should try some spelling variations:
"coder string matching algorithm complexity" » "coder string matching algorithms complexity" (Expand search), "coder string matching algorithmic complexity" (Expand search), "cordel string matching algorithm complexity" (Expand search), "closed string matching algorithm complexity" (Expand search), "modelo string matching algorithm complexity" (Expand search)
"api python system python programming" » "api action system python programming" (Expand search), "api python systems python programming" (Expand search), "api python sistemas python programming" (Expand search), "api python pytm python programming" (Expand search), "rpa python system python programming" (Expand search), "manim python system 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 string matching algorithm complexity\") OR (\"api python system python programming\"))~".
• Removing quotes may allow a broader search: (( coder string matching algorithm complexity ) OR ( api python system python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder string matching algorithm complexity") OR ("api python system python programming"))*.