Perhaps you should try some spelling variations:
"line segments feature analysis" » "line segment feature analysis", "line segment features analysis", "line segmental features analysis", "line segments capture analysis", "line segments failure analysis"
"line elements texture analysis" » "line aliments texture analysis", "line elements textual analysis", "line elements features analysis", "line elements capture analysis", "line elements structure analysis", "line elements failure analysis", "core elements texture analysis", "machine elements texture analysis", "line elements twoure analysis", "line elements timeure analysis"
"line elements text analysis" » "core elements text analysis", "machine elements text analysis", "line elements two analysis", "line elements time analysis", "line elements cost analysis", "line elements content 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 segments feature analysis") OR ((("line elements texture analysis") OR ("line elements text analysis")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"line segments feature analysis\") or (((\"line elements texture analysis\") OR (\"line elements text analysis\"))))".
• Removing quotes may allow a broader search: (( line segments feature analysis ) or ((( line elements texture analysis ) OR ( line elements text analysis )))).
• Adding a wildcard symbol may retrieve word variants: (("line segments feature analysis") or ((("line elements texture analysis") OR ("line elements text analysis"))))*.