Perhaps you should try some spelling variations:
"life skeletal structure analysis" » "life skeletal structures analysis", "life skeletal structural analysis", "liver skeletal structure analysis", "size skeletal structure analysis", "linear skeletal structure analysis"
"life segment cost analysis" » "life segment content analysis", "line segment cost analysis", "five segment cost analysis", "size segment cost analysis", "life segment case analysis", "life segment across analysis", "life segmental post analysis"
"pipe segment cost analysis" » "pipe segment content analysis", "pipe segment case analysis", "pipe segment across analysis", "pipe segmental post analysis", "pipe segments cost analysis", "line segment cost analysis", "five segment cost analysis"

Try widening your search to All Fields.

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 skeletal structure analysis") OR ((("life segment cost analysis") OR ("pipe segment cost analysis")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"life skeletal structure analysis\") or (((\"life segment cost analysis\") OR (\"pipe segment cost analysis\"))))".
• Removing quotes may allow a broader search: (( life skeletal structure analysis ) or ((( life segment cost analysis ) OR ( pipe segment cost analysis )))).
• Adding a wildcard symbol may retrieve word variants: (("life skeletal structure analysis") or ((("life segment cost analysis") OR ("pipe segment cost analysis"))))*.