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