Perhaps you should try some spelling variations:
structure analysis » structural analysis
laser analysis » lasers analysis, layer analysis, later analysis
life document » line document, le document, time document
segment laser » segment based, segment case, segment cases
line segment » line segments

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 document structure analysis ) OR ( line segment laser analysis )).
• Adding a wildcard symbol may retrieve word variants: (( life document structure analysis ) or ( line segment laser analysis ))*.