@yasinzeynu not quite sure what you want adjust. Ultimately you can only set your phone into vibration mode and change the vibration pattern. This is what the user manual describes:
Options
Change settings for various sounds on the device.
On the Settings screen, tap Sounds and vibration.
• S ound mode: Set the device to use sound mode, ***vibration mode***, or silent mode.
• ***V ibrate while ringing***: Set the device to vibrate and play a ringtone for incoming calls.
• U se Volume keys for media: Set the device to adjust the media volume level when you press the Volume key.
• V olume: Adjust the volume level for call ringtones, music and videos, system sounds, and notifications.
• R ingtone: Change the call ringtone.
• ***V ibration pattern: Select a vibration pattern.***
• N otification sounds: Change the notification sound.
• D o not disturb: Set the device to mute incoming calls, notification sounds, and media, except for allowed exceptions.
• T ouch sounds: Set the device to sound when you select an app or option on the touchscreen.
• S creen lock sounds: Set the device to sound when you lock or unlock the touchscreen.
• C harging sound: Set the device to sound when it is connected to a charger.
• D ialling keypad tones: Set the device to sound when you tap the buttons on the keypad.
• K eyboard sound: Set the device to sound when a key is touched.
• S ound quality and effects: Configure additional sound settings not