Perhaps you should try some spelling variations:
"coder coder density perl programming" » "coder coder density cell programming" (Expand search), "coder coder density period programming" (Expand search), "coder coder density fetal programming" (Expand search), "coder cover density perl programming" (Expand search), "coder powder density perl programming" (Expand search), "coder power density perl programming" (Expand search), "coder coder density per programming" (Expand search), "coder coder density peat programming" (Expand search), "coder coder density pore programming" (Expand search), "coder decoder density perl programming" (Expand search), "code code density perl programming" (Expand search), "decoder codec density perl programming" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons 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 density perl programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder density perl programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder density perl programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder density perl programming") OR ("api python python python programming"))*.