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", "slide sediment structure analysis", "lake sediment structure analysis", "fine sediment structure analysis"
"line segment case analysis" » "line segments case analysis", "line segment cases analysis", "line segment based analysis", "line 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 ("line segment case analysis")).
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