Perhaps you should try some spelling variations:
"coder decoder coverage of pre" » "coder code coverage of pre" (Expand search), "coder dead coverage of pre" (Expand search), "coder deep coverage of pre" (Expand search), "encoder decoder coverage of pre" (Expand search)
"api pythons python python programming" » "api pitons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pythons piton python programming" (Expand search), "api pythons pitons python programming" (Expand search), "api pythons pytm python programming" (Expand search), "api python python python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder coverage of pre\") OR (\"api pythons python python programming\"))~".
• Removing quotes may allow a broader search: (( coder decoder coverage of pre ) OR ( api pythons python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder decoder coverage of pre") OR ("api pythons python python programming"))*.