Perhaps you should try some spelling variations:
"coder segmentation and linear programming" » "color segmentation and linear programming" (Expand search), "over segmentation and linear programming" (Expand search), "gender segmentation and linear programming" (Expand search), "coder segmentation of linear programming" (Expand search), "coder segmentation and nonlinear programming" (Expand search)
"python coding regions python programming" » "python coding region python programming" (Expand search), "python producing regions python programming" (Expand search), "python coding reais python programming" (Expand search), "action coding regions python programming" (Expand search), "python code regions 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 segmentation and linear programming") OR ("python coding regions python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder segmentation and linear programming\") OR (\"python coding regions python programming\"))".
• Removing quotes may allow a broader search: (( coder segmentation and linear programming ) OR ( python coding regions python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder segmentation and linear programming") OR ("python coding regions python programming"))*.