Perhaps you should try some spelling variations:
ash reserves » cash reserves, gas reserves, bank reserves
sand soils » sandy soils, sands soils, land soils
soils bank » soils back
soils ash » soils a
soils ak » soils a, soils back, soils _

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: (( sand soils ash reserves ) OR ( soils ((soils bank) OR (soils ak)) series )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( sand soils ash reserves ) or ( soils ((soils bank) OR (soils ak)) series ))".
• Adding a wildcard symbol may retrieve word variants: (( sand soils ash reserves ) or ( soils ((soils bank) OR (soils ak)) series ))*.