Perhaps you should try some spelling variations:
"coder string caching algorithm complexity" » "coder string caching algorithms complexity" (Expand search), "coder string caching algorithmic complexity" (Expand search), "coder string matching algorithm complexity" (Expand search), "coder string machine algorithm complexity" (Expand search), "coder string teaching algorithm complexity" (Expand search), "coder string searching algorithm complexity" (Expand search), "cordel string caching algorithm complexity" (Expand search), "closed string caching algorithm complexity" (Expand search), "modelo string caching algorithm complexity" (Expand search)
"api in python python programming" » "api in pythons python programming" (Expand search), "api in piton python programming" (Expand search), "api in pitons python programming" (Expand search), "api _ python python programming" (Expand search), "api an python python programming" (Expand search), "fpi in python python programming" (Expand search), "gpi in 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 string caching algorithm complexity\") OR (\"api in python python programming\"))~".
• Removing quotes may allow a broader search: (( coder string caching algorithm complexity ) OR ( api in python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder string caching algorithm complexity") OR ("api in python python programming"))*.