| sciencedirect search | 1.76 | 1 | 579 | 20 | 36 |
| sciencedirect search engine | 1.29 | 0.8 | 4548 | 27 | 40 |
| sciencedirect search tips | 1.95 | 0.1 | 8403 | 25 | 82 |
| sciencedirect search results | 0.78 | 1 | 3387 | 28 | 88 |
| sciencedirect search string | 0.05 | 0.3 | 9491 | 27 | 12 |
| sciencedirect advanced search | 1.54 | 0.1 | 5388 | 29 | 87 |
| sciencedirect article search | 0.15 | 0.5 | 7619 | 28 | 74 |
| sciencedirect journal search | 0.61 | 0.9 | 2627 | 28 | 11 |
| sciencedirect author search | 1.03 | 0.8 | 4644 | 27 | 28 |
| sciencedirect keyword search | 1.45 | 0.9 | 5666 | 28 | 29 |
| sciencedirect database search | 1.5 | 0.6 | 2659 | 29 | 18 |
| sciencedirect paper search | 1.43 | 0.2 | 2874 | 26 | 37 |
