Perhaps you should try some spelling variations:
"pipe segment structure analysis" » "pipe segment structural analysis", "pipe segmental structure analysis", "pipe sediment structure analysis", "pipe pigment structure analysis", "pipe segments structure analysis", "five segment structure analysis", "size segment structure analysis"
"line segments cost analysis" » "line segments cross analysis", "line segments best analysis", "line segments cut analysis", "line segments content analysis"
"line segment cost analysis" » "line segment content analysis", "line segment case analysis", "line segment across analysis", "line segmental post 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: (("pipe segment structure analysis") OR ((("line segments cost analysis") OR ("line segment cost analysis")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"pipe segment structure analysis\") or (((\"line segments cost analysis\") OR (\"line segment cost analysis\"))))".
• Removing quotes may allow a broader search: (( pipe segment structure analysis ) or ((( line segments cost analysis ) OR ( line segment cost analysis )))).
• Adding a wildcard symbol may retrieve word variants: (("pipe segment structure analysis") or ((("line segments cost analysis") OR ("line segment cost analysis"))))*.