Perhaps you should try some spelling variations:
sediment structure » sedimentary structures, document structure, argument structure
structure analysis » structural analysis
lake sediment » lake sediments
line segment » line segments
segment case » segment cases, segment based, segment laser

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( lake sediment structure analysis ) OR ( line segment case analysis )).
• Adding a wildcard symbol may retrieve word variants: (( lake sediment structure analysis ) or ( line segment case analysis ))*.