Perhaps you should try some spelling variations:
"coder estimation _ coding program" » "model estimation _ coding program" (Expand search), "power estimation _ coding program" (Expand search), "color estimation _ coding program" (Expand search), "coder estimation _ cloning program" (Expand search), "coder estimation _ loading program" (Expand search), "coder estimation _ cooling programs" (Expand search)
"based program python python programming" » "based program patos python programming" (Expand search), "based program paths python programming" (Expand search), "based program path python programming" (Expand search), "based program pythons python programming" (Expand search), "based program piton python programming" (Expand search), "based program pitons 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 estimation _ coding program") OR ("based program python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder estimation _ coding program\") OR (\"based program python python programming\"))*".
• Removing quotes may allow a broader search: (( coder estimation _ coding program ) OR ( based program python python programming ))*.