Perhaps you should try some spelling variations:
"coder _ efficient algorithms array" » "coder _ efficient algorithm array" (Expand search), "coder _ efficient algoritmos array" (Expand search), "coder _ efficient algorithms are" (Expand search), "coder _ efficient algorithms dream" (Expand search)
"api citons python python programming" » "api pitons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pythons python python programming" (Expand search), "api citons pythons python programming" (Expand search), "api citons piton python programming" (Expand search), "api citons pitons 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 _ efficient algorithms array\") OR (\"api citons python python programming\"))~".
• Removing quotes may allow a broader search: (( coder _ efficient algorithms array ) OR ( api citons python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder _ efficient algorithms array") OR ("api citons python python programming"))*.