Where are you seeing this? While searching?While you do this, could you please fix “these words were removed because they were either too long, too short, or to common:” it is extremely annoying.
The search indexing excludes short (< 4 chars) and common words for optimization; turning that off would cause a serious negative impact on the performance of the site. We aren't going to change that.
I've never seen an issue with a search sequence being too long, but I suppose it's possible and also probably related to search optimization.
For a site as active and with as much content as TCF has, search optimization is important and we don't want to mess with that.