Perhaps you should try some spelling variations:
"life segment features analysis" » "life segment feature analysis", "life segment measures analysis", "life salient features analysis", "life element features analysis", "life recent features analysis", "line segment features analysis", "five segment features analysis", "size segment features analysis"
"pipe segment concept analysis" » "pipe segment content analysis", "pipe cement concept analysis", "pipe segment conceptual analysis", "pipe segments concept analysis", "line segment concept analysis", "five segment concept 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: (("life segment features analysis") OR ("pipe segment concept analysis")).
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