Yet another senseless text after little a short span of time<em> (this is an awkward construction)</em>

Hello,
I have been using Anki-software to memorize new English words for already ten weeks already. Meanwhile a the program's statistics says that I've learnt 256 words within that period. There is a convinient feature in the statistics. It that shows me my unfortunate tries failed attempts, and I use this to ascertain words, which I've ever mistaken with determine <em>(ascertein is correct but way too formal here)</em> wich words I've made mistakes with. Thus no one word can conceal of me will escape me <em>(I really don't have a nice way to rewrite this but as you wrote is really strange)</em>, and I'll attain more dependable results in memorizing of them.
I have percieved explicitly noticed, that proposed this method is feasible <em>(maybe another word would be better such as effective)</em>. I suspect, I have considerable troubles with tenses and prepositions, but I've memorized that those twelve elusive words by puting using them in this text.
Thanks for reading. Best regards.

Good luck. You're definitely on the right track.