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", "line segment structure analysis", "five segment structure analysis", "size segment structure analysis"
"pipe segments structure analysis" » "pipe segments structural analysis", "pipe segments structures analysis", "pipe segmental structure analysis", "pipe segment structured analysis", "time segments structure analysis", "liver segments structure analysis", "lines segments structure analysis", "line segments structure analysis", "five segments structure analysis", "size segments structure analysis"
"line segments cost analysis" » "line segment cost analysis", "line segments cross analysis", "line segments best analysis", "line segments content 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 ("pipe segments structure analysis"))) OR ("line segments cost analysis")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"pipe segment structure analysis\") OR (\"pipe segments structure analysis\"))) or (\"line segments cost analysis\"))".
• Removing quotes may allow a broader search: (((( pipe segment structure analysis ) OR ( pipe segments structure analysis ))) or ( line segments cost analysis )).
• Adding a wildcard symbol may retrieve word variants: (((("pipe segment structure analysis") OR ("pipe segments structure analysis"))) or ("line segments cost analysis"))*.