Perhaps you should try some spelling variations:
"life segment structure analysis" » "life segment structural analysis", "life segmental structure analysis", "life sediment structure analysis", "life pigment structure analysis", "line segment structure analysis", "pipe segment structure analysis", "size segment structure analysis"
"five segment structure analysis" » "five segment structural analysis", "five segmental structure analysis", "five sediment structure analysis", "five pigment structure analysis", "line segment structure analysis", "finite segment structure analysis", "five argument structure analysis"
"life segment cost analysis" » "life segment content analysis", "line segment cost analysis", "pipe segment cost analysis", "size segment cost analysis", "life segment case analysis", "life segment across analysis", "life segmental post analysis"

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