Eich chwiliad - "((combustiveis or combustible) or combustions) (fossilss" or (fossili" or fossilised"))* - ddim yn cyfateb ag unrhyw adnoddau

Efallai y dylech gynnig rhai amrywiadau sillafu:
combustiveis » combustibles
combustions » combustion, combustors, combusting
fossilss" » fossils", fossilis", fossiles"
fossili" » fossilis", fossil", fossils"
fossilised" » fossilissed", fossilsed", fossilssed", fossilized", fossilis"

Efallai y cewch fwy o ganlyniadau drwy addasu'ch ymholiad chwilio.