Just upgrade Diary to v3.7.2 BETA that includes Moodle Tags. makes it much easier to find a particular entry. Still needs modification to go directly to the entry you select in the resulting list, when you click on a particular Tag.
Right now, if you click on a tag, the resulting list shows only the first 200 characters of any entry listed with that tag. I am open to suggestions on just how many characters to show. I have the limit set because some diary entries can wind up being very long based on the writing assignment. e.g. My students typical standard five paragraph essays, are usually over two-thousand characters.