Difficulty about using words

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Aug 6, 2012 13:05
I can speak daily English like about weather, where I'm living, what I study...
But when I'm talking about deeper subject such as society, economy, love and so on, I can't remember proper words.

I have memorized many words, but it doesn't come out.
Every time I feel this, I become unconfident and speechless.

It is not about how many chances to speak English, It's about my way to study.

What should I do?