Efallai y dylech gynnig rhai amrywiadau sillafu:
combustiveis » combustions
combustibles » combustible, compatibles, combustions
combusting » combustions, combustion, composting
fossili" » fossilis", fossil", fossils"
fossilised" » fossilissed", fossilsed", fossilssed", fossilis"
fossilized" » fossiliszed", fossilzed", fossilszed"

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

• Cynnal chwiliad niwlog a allai adalw termau sydd wedi'u sillafu'n debyg: "((combustiveis or combustibles) or combusting) (fossili" or (fossilised" or fossilized"))~.
• Os ydych yn ceisio defnyddio gweithredwyr Boolean, rhaid defnyddio PRIFLYTHRENNAU: "((combustiveis or combustibles) or combusting) (fossili" OR (fossilised" or fossilized")).
• Gallai tynnu'r dyfynodau ganiatáu chwiliad ehangach: ((combustiveis or combustibles) or combusting) (fossili or (fossilised or fossilized )).
• Efallai y byddai ychwanegu symbol nod-chwiliwr yn adfer amrywiad geiriau: "((combustiveis or combustibles) or combusting) (fossili" or (fossilised" or fossilized"))*.