Perhaps you should try some spelling variations:
content analysis » sentiment analysis, component analysis, element analysis
sediment content » sediment control, sediment contami, sediment continuity
lake sediment » lake sediments
sediment item » sediment tem, sediment sites, sediment diatom
item analysis » fem analysis, sem analysis, dem analysis

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 content analysis ) OR ( lake sediment item analysis )).
• Adding a wildcard symbol may retrieve word variants: (( lake sediment content analysis ) or ( lake sediment item analysis ))*.