Perhaps you should try some spelling variations:
"coder coder java semantics proof" » "coder coder java semantics of" (Expand search), "coder coder java semantics from" (Expand search), "coder coder java semantics tool" (Expand search), "coder coder and semantics proof" (Expand search), "coder coder scalar semantics proof" (Expand search), "coder decoder java semantics proof" (Expand search), "code code java semantics proof" (Expand search), "decoder codec java semantics proof" (Expand search), "coder codes java semantics proof" (Expand search), "coder xcode java semantics proof" (Expand search)
"api pitons python python programming" » "api pitons pythons python programming" (Expand search), "api pitons piton python programming" (Expand search), "api pitons pytm python programming" (Expand search), "api citons python python programming" (Expand search), "api pitoni python python programming" (Expand search), "api pitoes 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 java semantics proof") OR ("api pitons python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder java semantics proof\") OR (\"api pitons python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder java semantics proof ) OR ( api pitons python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder java semantics proof") OR ("api pitons python python programming"))*.