Perhaps you should try some spelling variations:
communication concepts » communication circuits, communication congresses, communication channels
from compression » from oppression, from compressive, frames compression
primates models » primate models, primate model, primates modern
primates notes » primates ten, primates apes, primates some
image code » image codes, image model, image case

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: communication concepts from compression ((((primates notes) or (primates models))) or (image code))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication concepts from compression ((((primates notes) OR (primates models))) OR (image code)).
• Adding a wildcard symbol may retrieve word variants: communication concepts from compression ((((primates notes) or (primates models))) or (image code))*.