| Share | Phrase |
|---|
| 38.42% | improve combustibility [perform operation] |
| 14.70% | enhance combustibility [perform operation] |
| 14.37% | improved [effectiveness] combustibility |
| 14.15% | mixture combustibility |
| 10.54% | good [character] combustibility |
| 4.14% | provide combustibility [perform operation] |
| 3.66% | fuel combustibility |