Now, when you are searching an element. By default, all the previous searched entries are shown. And maybe there's a ridiculous or compromising word that I prefer to delete. But the only way I've found to do this is to delete the: /(Root)/data/data/com.luckydroid.droidbase/databases/suggestions.db file.
This is only possible for rooted devices, and I think there's a better way to do it.