Efallai y dylech gynnig rhai amrywiadau sillafu:
combustiveis » combustions, combustibles
compostions » compositions, compostion, composition
combustors » combustor
fossilis" » fossils", fossil", vassilis", fossilss", fossiles"
fossilised" » fossilsed", fossiled", vassilised", fossilssed", fossilesed", fossilized"
fossili" » fossil", 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: "(combustiveis or (compostions or combustors)) ((fossilis" OR fossili") or fossilised")~.
• Efallai y bydd y geiriau AND, OR a NOT yn drysu'r chwiliad; ceisiwch ychwanegu ddyfynodau.: "\"(combustiveis or (compostions or combustors)) ((fossilis\" OR fossili\") or fossilised\")".
• Gallai tynnu'r dyfynodau ganiatáu chwiliad ehangach: (combustiveis or (compostions or combustors)) ((fossilis OR fossili ) or fossilised ).
• Efallai y byddai ychwanegu symbol nod-chwiliwr yn adfer amrywiad geiriau: "(combustiveis or (compostions or combustors)) ((fossilis" OR fossili") or fossilised")*.