Perhaps you should try some spelling variations:
built polymers » brittle polymers
host polymers » cost polymer, about polymers, raft polymers
soft polymers » soft polymer, soft polymeric, raft polymers
ucst polymers » ucst polymer, cost polymer, guest polymer
cnt polymers » cnt polymer, plant polymers, raft 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: ((((host polymers) OR (soft polymers))) OR (((((ucst polymers) OR (cnt polymers))) OR (built polymers)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((host polymers) or (soft polymers))) or (((((ucst polymers) OR (cnt polymers))) or (built polymers))))".
• Adding a wildcard symbol may retrieve word variants: ((((host polymers) or (soft polymers))) or (((((ucst polymers) OR (cnt polymers))) or (built polymers))))*.