Perhaps you should try some spelling variations:
"coder string caching algorithmic complexity" » "coder string caching algorithm complexity" (Expand search), "coder string caching algorithms complexity" (Expand search), "coder string unpacking algorithmic complexity" (Expand search), "coder string matching algorithmic complexity" (Expand search), "coder string teaching algorithmic complexity" (Expand search), "coder string searching algorithmic complexity" (Expand search), "cordel string caching algorithmic complexity" (Expand search), "closed string caching algorithmic complexity" (Expand search), "modelo string caching algorithmic complexity" (Expand search)
"api _ python python programming" » "api _ pythons python programming" (Expand search), "api _ piton python programming" (Expand search), "api _ pitons 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 caching algorithmic complexity") OR ("api _ python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder string caching algorithmic complexity\") OR (\"api _ python python programming\"))".
• Removing quotes may allow a broader search: (( coder string caching algorithmic complexity ) OR ( api _ python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder string caching algorithmic complexity") OR ("api _ python python programming"))*.