Tech is kind of hard to understand because some powers only prime against certain defenses for combos, some powers have short windows to combo explode them, different radius on different combo explosions etc. There's just a lot of stuff you can go into on tech explosions.
I would start looking at the different combo mechanics threads in the library and kind of go from there. Some powers are just different like Cryo Blast will prime health but Snap Freeze primes versus any defense.
To be fair, the tech combo mechanics can be very daunting to a new player and even I forget certain details and need to refresh my memory from time to time. I think it's best to learn the basics and once you've got them down, go from there. Don't forget, I'm not even sure OP knows how to make tech bursts, cryo explosions or fire explosions consistently. I recommend having a look, but don't let it overwhelm you. It's important to get the basics down first. Besides, I don't know what level you play Saga, but combos aren't as effective on silver or bronze and you're probably better off going for pure damage. It's important info to know once you go gold up though!
No he estudiado español en cinco años, pero entendi practicamente todo eso. 
Nunca se olvida cuando aprendes una nueva lingua! 
One question, how the hell do you do the "ñ" or any accents for that matter? I'm not sure if I can on my English laptop, but I also happen to be an internet scrub 