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