Perhaps you should try some spelling variations:
"coder and preprocessing _ programming" » "coder and reprocessing _ programming" (Expand search), "coder based preprocessing _ programming" (Expand search), "coder data preprocessing _ programming" (Expand search), "code and preprocessing _ programming" (Expand search), "codes and preprocessing _ programming" (Expand search), "poder and preprocessing _ programming" (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 and preprocessing _ programming\") OR (\"api pythons python python programming\"))~".
• Removing quotes may allow a broader search: (( coder and preprocessing _ programming ) OR ( api pythons python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder and preprocessing _ programming") OR ("api pythons python python programming"))*.