Perhaps you should try some spelling variations:
multilayered reservoirs » multilayer reservoir
multilayered reflectors » multilayered reflection, multilayer reflection, multilayer reflective
multilayered reservoir » multilayered research
multipole reservoir » multiple reservoir, multipurpose reservoir, multilayer reservoir
multiple reservoirs » multiple reservoir, multi reservoir, mantle reservoirs
multi reservoirs » multi reservoir, belt reservoirs, delta reservoirs

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: ((((((multipole reservoir) OR (((multiple reservoirs) OR (multi reservoirs))))) OR (((multilayered reservoirs) OR (multilayered reflectors))))) OR (multilayered reservoir)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((multipole reservoir) or (((multiple reservoirs) or (multi reservoirs))))) or (((multilayered reservoirs) OR (multilayered reflectors))))) or (multilayered reservoir))".
• Adding a wildcard symbol may retrieve word variants: ((((((multipole reservoir) or (((multiple reservoirs) or (multi reservoirs))))) or (((multilayered reservoirs) OR (multilayered reflectors))))) or (multilayered reservoir))*.