Most of the titles of similar items only use about 3 different keywords. You should use the search suggestions to find different phrases for your items so you can get found on multiple niche searches. Also, your title could be a little longer.
Be sure your keywords are in your tags in phrases. Single word tags limit your exposure. If a keyword is important it should be in your titles AND tags.
You should fill out a shop announcement.
Lastly, 4 sales in 1 month is not bad by typical Etsy standards. It takes a while to get started.