Perhaps you should try some spelling variations:
multilayered research » multifaceted research, multilevel research
multipole reservoir » multiple reservoir, multipurpose reservoir, multilayer reservoir
multiple reservoirs » multiple reservoir, multi reservoirs, multi reservoir

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