| Keyword | CPC | PCC | Volume | Length string | Score |
|---|---|---|---|---|---|
| ho et al. 2010 | 1.68 | 0.5 | 795 | 14 | 14 |
| ho et al. 2011 | 1.94 | 0.1 | 4530 | 14 | 48 |
| ho et al. 2020 | 0.09 | 0.1 | 2360 | 14 | 32 |
| ho et al. 2019 | 1.72 | 0.9 | 3655 | 14 | 9 |
| ho et al. 2018 | 1.76 | 0.3 | 8049 | 14 | 1 |
| ho et al. 2015 | 1.39 | 0.8 | 8796 | 14 | 11 |
| ho et al. 2014 | 1.78 | 0.9 | 476 | 14 | 99 |
| ho et al. 2016 | 0.08 | 0.5 | 9420 | 14 | 98 |
| ho et al. 2017 | 1.33 | 0.3 | 7953 | 14 | 73 |
| ho et al. 2012 | 0.73 | 0.7 | 7614 | 14 | 11 |
| ho et al. 2002 | 0.55 | 0.6 | 142 | 14 | 42 |
| ho et al. 2009 | 1.45 | 0.4 | 5182 | 14 | 69 |
