Perhaps you should try some spelling variations:
"life sediment structure analysis" » "life sedimentary structures analysis", "life document structure analysis", "life argument structure analysis", "life sediment structural analysis", "like sediments structure analysis", "slide sediment structure analysis", "lake sediment structure analysis"
"life segment cost analysis" » "life segment content analysis", "line segment cost analysis", "five segment cost analysis", "pipe segment cost analysis", "life segment across analysis", "life segmental post analysis", "life segment about analysis"
"life segment case analysis" » "line segment case analysis", "five segment case analysis", "pipe segment case analysis", "life segment cases analysis", "life segment based analysis", "life segment laser 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 sediment structure analysis") OR ((("life segment cost analysis") OR ("life segment case analysis")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"life sediment structure analysis\") or (((\"life segment cost analysis\") OR (\"life segment case analysis\"))))".
• Removing quotes may allow a broader search: (( life sediment structure analysis ) or ((( life segment cost analysis ) OR ( life segment case analysis )))).
• Adding a wildcard symbol may retrieve word variants: (("life sediment structure analysis") or ((("life segment cost analysis") OR ("life segment case analysis"))))*.