Perhaps you should try some spelling variations:
"coder coder blocking concurrent programming" » "coder coder blocking constraint programming" (Expand search), "coder coder proving concurrent programming" (Expand search), "coder cancer blocking concurrent programming" (Expand search), "coder mode locking concurrent programming" (Expand search), "coder pore blocking concurrent programming" (Expand search), "coder decoder blocking concurrent programming" (Expand search), "code code blocking concurrent programming" (Expand search), "decoder codec blocking concurrent programming" (Expand search)
"api pythons python python programming" » "api pitons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pythons piton python programming" (Expand search), "api pythons pitons python programming" (Expand search), "api pythons pytm python programming" (Expand search), "api 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 coder blocking concurrent programming") OR ("api pythons python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder blocking concurrent programming\") OR (\"api pythons python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder blocking concurrent programming ) OR ( api pythons python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder blocking concurrent programming") OR ("api pythons python python programming"))*.