Practice and learning the right techniques will help. Also, you can find out how I may help you by viewing my profile.

What is the right technique of typing fast? Please reply me.

There are many things you must do to succeed. You can get vast advice for free by visiting my profile. You have nothing to lose and much to gain.

I don't really know what you would consider 'fast'; I consider 120 WPM fast, I type from 90 ~ 110 WPM.
So, I'll give you general advice on what I think helped me type faster.
From under 100 WPM, the most important focus is on touch typing. All your alphabets + shift + punctuations should be 'hard wired' to the point where you can just imagine a imaginary keyboard on a table and type a sentence.
From over 100 WPM or reaching 100 WPM, you probably will develop a memory for the numbers, hyphen, and quotation marks. There are smaller improvements you can make by changing which hand or finger presses which key. For example, I was typing the key 'y' with my left hand, after I switched to my right, I can type without hiccups.
Memorising the keys are the first priority for most people.

I am terrible at typing fast and accurate. :/

BY only Practise