Perhaps you should try some spelling variations:
"liver segmentation methods and programming" » "based segmentation methods and programming" (Expand search), "tumor segmentation methods and programming" (Expand search), "liver segmentation methods _ programming" (Expand search), "liver segmentation methods goal programming" (Expand search)
"python using python python programming" » "python using pythons python programming" (Expand search), "python using piton python programming" (Expand search), "python using pitons python programming" (Expand search), "python usando python python programming" (Expand search), "python coding python python programming" (Expand search), "action using python python programming" (Expand search), "python in python 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: (("liver segmentation methods and programming") OR ("python using python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"liver segmentation methods and programming\") OR (\"python using python python programming\"))".
• Removing quotes may allow a broader search: (( liver segmentation methods and programming ) OR ( python using python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("liver segmentation methods and programming") OR ("python using python python programming"))*.