Efallai y dylech gynnig rhai amrywiadau sillafu:
combustibles » combustible, compatibles, comestible
combustions » combustion, combustors, compostions
combusting » combustion, composting, combating
fossilis" » fossils", fossilised", vassilis", fossilss", fossiles"
fossilss" » fossils", fossiles", fossile"
fossili" » fossils", fossile"

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

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