Perhaps you should try some spelling variations:
sedimentary structures » secondary structures
sediment structure » document structure, argument structure, event structure
segment based » fragment based
line segment » line segments

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: (( life ((sediment structure) OR (sedimentary structures)) analysis ) OR ( line segment based analysis )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( life ((sediment structure) OR (sedimentary structures)) analysis ) or ( line segment based analysis ))".
• Adding a wildcard symbol may retrieve word variants: (( life ((sediment structure) OR (sedimentary structures)) analysis ) or ( line segment based analysis ))*.