Perhaps you should try some spelling variations:
"line segments structure analysis" » "line segments structures analysis", "line segment structure analysis", "line segmental structure analysis", "line segments structural analysis", "like segments structure analysis", "live segments structure analysis"
"life segment test analysis" » "life segment cost analysis", "life segment testing analysis", "life segment blot analysis", "line segment test analysis", "pipe segment test analysis", "size segment test analysis", "life segment trees analysis", "life segment tree analysis"
"five segment test analysis" » "five segment cost analysis", "five segment testing analysis", "five segment blot analysis", "five segment trees analysis", "five segment tree analysis", "line segment test analysis", "finite segment test analysis", "five argument test 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: (("line segments structure analysis") OR ((("life segment test analysis") OR ("five segment test analysis")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"line segments structure analysis\") or (((\"life segment test analysis\") OR (\"five segment test analysis\"))))".
• Removing quotes may allow a broader search: (( line segments structure analysis ) or ((( life segment test analysis ) OR ( five segment test analysis )))).
• Adding a wildcard symbol may retrieve word variants: (("line segments structure analysis") or ((("life segment test analysis") OR ("five segment test analysis"))))*.