Perhaps you should try some spelling variations:
structure analysis » structural analysis
pigment structure » ligament structure, alignment structure, argument structure
cost analysis » content analysis
life pigment » like pigment, bile pigment, life alignment
line segment » line segments
segment cost » segment case, segment across, segmental post

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