Perhaps you should try some spelling variations:
"coder coder teaching concurrent programming" » "coder coder teaching constraint programming" (Expand search), "coder coder testing concurrent programming" (Expand search), "coder coder training concurrent programming" (Expand search), "coder coder teaching content programming" (Expand search), "coder code teaching concurrent programming" (Expand search), "coder poder teaching concurrent programming" (Expand search), "coder model teaching concurrent programming" (Expand search), "coder decoder teaching concurrent programming" (Expand search), "code code teaching concurrent programming" (Expand search), "decoder codec teaching 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 teaching concurrent programming") OR ("api pythons python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder teaching concurrent programming\") OR (\"api pythons python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder teaching concurrent programming ) OR ( api pythons python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder teaching concurrent programming") OR ("api pythons python python programming"))*.