Perhaps you should try some spelling variations:
"coder coder unit problem progress" » "coder coder unit problems progress" (Expand search), "coder coder unit problem process" (Expand search), "coder coder unit program progress" (Expand search), "coder decoder unit problem progress" (Expand search), "code code unit problem progress" (Expand search), "decoder codec unit problem progress" (Expand search), "coder power unit problem progress" (Expand search), "coder color unit problem progress" (Expand search), "coder joinder unit problem progress" (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 unit problem progress") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder unit problem progress\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder unit problem progress ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder unit problem progress") OR ("api python python python programming"))*.