Efallai y dylech gynnig rhai amrywiadau sillafu:
combustiveis » combustions, combustibles
combustors » combustor
fossilis" » fossils", fossili", vassilis"
fossilised" » fossilsed", fossilied", vassilised", fossilized"
fossile" » fossils"
fossiles" » fossilss", fossils", missiles", fissile"

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 combustors) ((fossilis" OR (fossile" or fossil")) OR (fossilised" or fossiles"))~.
• Efallai y bydd y geiriau AND, OR a NOT yn drysu'r chwiliad; ceisiwch ychwanegu ddyfynodau.: "\"(combustiveis or combustors) ((fossilis\" OR (fossile\" or fossil\")) OR (fossilised\" or fossiles\"))*".
• Gallai tynnu'r dyfynodau ganiatáu chwiliad ehangach: (combustiveis or combustors) ((fossilis OR (fossile or fossil )) OR (fossilised or fossiles ))*.