Perhaps you should try some spelling variations:
"line segmental features analysis" » "line segment features analysis", "line segment feature analysis", "line segmental nature analysis", "line segmental feature analysis", "line segmental measures analysis", "line segments features analysis", "one segmental features analysis"
"liver segmental texture analysis" » "liver segmental nature analysis", "liver segmentation texture analysis", "liver segmental structure analysis", "liver segmental capture analysis", "liver segmental text analysis", "governs segmental texture analysis", "polymer segmental texture analysis"
"liver segments texture analysis" » "liver segments capture analysis", "liver segments text analysis", "liver segments structure analysis", "liver segments feature analysis", "liver aliments texture analysis", "liver elements texture analysis", "linear segments texture analysis", "line segments texture analysis", "outer segments texture analysis"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("line segmental features analysis") OR ((("liver segmental texture analysis") OR ("liver segments texture analysis")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"line segmental features analysis\") or (((\"liver segmental texture analysis\") OR (\"liver segments texture analysis\"))))".
• Removing quotes may allow a broader search: (( line segmental features analysis ) or ((( liver segmental texture analysis ) OR ( liver segments texture analysis )))).
• Adding a wildcard symbol may retrieve word variants: (("line segmental features analysis") or ((("liver segmental texture analysis") OR ("liver segments texture analysis"))))*.