There are some words Voice Attack has trouble understanding for me. What I usually do is, say the word or command 4 or 5 times. When Voice Attack seems to hear the same word, or command multiple times in a row, I use those word with the command.
Example:
Three, Voice Attack doesn't hear Three, it hears Stirring. No idea how it hears that, when I'm trying to say Three, but it does. So, this is the command I use to make Three work for me, pretty much every time I use it now.
Stirring;Three - I kept Three, just encase, it ever really hears the correct work I'm trying to say.
Another Examples
Stepped;Six - Six apparently sounds like Stepped.
Buying;By;Five - When I say Five, it hears either Buying, or By, so, I used both.
Kind;Nine - This one here, was hard, Because it confused it for Five. I'd say nine, and it would active the Five command. So, I say, Kind, for Nine. Luckily, there aren't many commands I have to remember that are different then what I want.
But usually, after you give a few different possible answers, Voice Attack is more likely to understand the command you are trying to say, even if, it's different words it hears, you can add those words, as possible command triggers.
Also, Mic's can make a big difference. I'm using the Amigo Cobra Buddy Mic. Under $40 on Amazon. It's a great mic, works good up close and a couple feet away, or across the room if you yell. Also, I run a loud box fan, pretty much at all times in my room, and it has no problem with it. White noise isn't a problem, it's other noises, that can be confused as a command, and make your voice not heard. Get a USB mic, if you don't already have one. They are usually dead quiet when plugged in. You should test you mic, in a dead quiet room. Use a program to record your voice, but instead of talking, just record like 10 seconds of quiet and play it back. Now, when you play it back, do you hear quiet, or are there odd sounds. If you are picking up sounds that aren't there, then that could be your problem. If it's a 3.5mm connection, then try a usb mic, if it's a USB mic, then try a different USB port, move from the back to the front of your computer, or the other way around, till you hear plain quiet on the playback.
Anyway, I don't know if any of that will help or not. But I thought I'd give it a try.