Perhaps you should try some spelling variations:
"line segment structure analysis" » "line segment structural analysis", "line segmental structure analysis", "line sediment structure analysis", "line pigment structure analysis", "line segments structure analysis"
"size segment tree analysis" » "size segment trend analysis", "size segment case analysis", "size segment code analysis", "size sediment tree analysis", "five segment tree analysis", "pipe segment tree analysis", "size segment trees analysis", "size segment test 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: (("line segment structure analysis") OR ("size segment tree analysis")).
• Removing quotes may allow a broader search: (( line segment structure analysis ) or ( size segment tree analysis )).
• Adding a wildcard symbol may retrieve word variants: (("line segment structure analysis") or ("size segment tree analysis"))*.