Why can't you find words? In most cases because you don't know Hebrew well enough. But this is exactly the point (and the catch). You use your dictionary because you don't know Hebrew well enough!
What exactly is the problem? Although your frustration is valid, your dictionary is very likely to have the word that you can't find, but it is not "smart enough" to understand what you want.
Why are most of the existing dictionaries not "smart enough"? Because manmade instruments are only as "smart" as their designers, and the designers of most of the Hebrew dictionaries don't think of you, the English speaking person. Rather, all the dictionaries are made to serve Hebrew speakers who want to learn English.
Why is that a problem if these dictionaries still have both Heb/Eng Eng/Heb search functions? Since the designers assume that you know Hebrew, their emphasis is on input of Hebrew words into the dictionary. This is your weak area. You don't know how to input the words into your dictionary.
What's wrong in the way you input words into the dictionary?
Since you don't know Hebrew well enough, you input your words exactly as you see them: you are trying to read some Hebrew text, you come across a verb that you don't know, you type the verb exactly as you see it in your text -- your dictionary does not find it!

• With its 6,200,000 words and 300,000 expressions and idioms, Babylon leaves any other existing dictionary far behind.
• This is the only dictionary that includes all* the Hebrew verbs -- each with all its possible conjugations! This means that every word and every verb, (in any form and in any tense), is already in Babylon.
• Babylon allows searching for expressions that include multiple words.
• Babylon also allows you to toggle between words in any sentence and instantly translate each word while still keeping your current search active.
• You can bookmark desired words and their translations for later focused study.
• It has a high resolution green display with a pleasant dark blue text color, especially designed to reduce eye fatigue

With its huge 6,200,000 word base and 300,000 expressions, Babylon will find for you every* word and every verb in every possible conjugation!
HOW DOES IT WORK?
Besides finding every word and every conjugated verb, Babylon "thinks" ahead. As soon as you type the first letter Babylon starts searching and narrows its search as you type more letters. You almost never need to type the entire word you are looking for -- Babylon already knows what you are looking for and displays your word and related expressions with this word (see picture below). All you need to do is to select it and press ENTER for instant translation. Further, Babylon takes full advantage of it huge 16MB memory (all other dictionaries range between half a MB to 1.5 MB) and gives you, alongside definitions, more wordy explanations.
*Although very unlikely, it is still possible that an occasional rare verb will not be found.