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)
"lines python python python programming" » "lines pythons python python programming" (Expand search), "lines piton python python programming" (Expand search), "lines pitons python python programming" (Expand search), "in python python python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder string matching algorithm complexity") OR ("lines python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder string matching algorithm complexity\") OR (\"lines python python python programming\"))".
• Removing quotes may allow a broader search: (( coder string matching algorithm complexity ) OR ( lines python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder string matching algorithm complexity") OR ("lines python python python programming"))*.