Vox Modern Spanish and English Dictionary

Searching is difficult

When one searches for a word, the results aren't optimized for a dictionary, rather for a regular book. E.g. If I look up the word at, I don't get the word at and its corresponding translations. I get any word that contains the letters of the word at, such as attempt or ate. This is more of an Apple iBooks problem – not being able to search a dictionary accordingly – but I can't effectively use the dictionary without an adequate search function. So therefore 3 stars.