Perhaps you should try some spelling variations:
communication documentation » communication foundation, communication communication, communication conversation
documentation periodicals » polymerization periodicals, communication periodicals, conservation periodicals
perfusion based » permission based, fusion based, diffusion based
persian based » hessian based, person based, durian based

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "communication documentation periodicals ((persian based) OR (perfusion based)) linear~".
• Adding a wildcard symbol may retrieve word variants: communication documentation periodicals ((persian based) OR (perfusion based)) linear*.