Perhaps you should try some spelling variations:
about polymers » about polygenes, about polygons, bound polymers
raft polymers » graft polymers, graft copolymers, grafted polymers
soft polymers » soft polymer, soft polymeric, host polymers
cnt polymers » cnt polymer, ucst polymers, plant polymers

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: ((((((raft polymers) OR (soft polymers))) OR (about polymers))) OR (cnt polymers)).
• Adding a wildcard symbol may retrieve word variants: ((((((raft polymers) or (soft polymers))) or (about polymers))) or (cnt polymers))*.