Perhaps you should try some spelling variations:
"coder coder variable frequency phase" » "coder coder variable frequency based" (Expand search), "coder under variable frequency phase" (Expand search), "coder mode variable frequency phase" (Expand search), "coder color variable frequency phase" (Expand search), "coder decoder variable frequency phase" (Expand search), "code code variable frequency phase" (Expand search), "decoder codec variable frequency phase" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ 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 variable frequency phase") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder variable frequency phase\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder variable frequency phase ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder variable frequency phase") OR ("on python python python programming"))*.