you can take green minibus No.95K from Tsuen Wan West Station to Tsuen Wan Station
Here is the information:
Get On Point:荃灣西站"D"出口
圖片參考:http://www.i-busnet.com/images/mtr_s.gif
and then get off at exit B2,you will see 全豐中心
Fee:$2.8(West Rail passenger can change this minibus free with the valid Octopous)
Tsuen Wan Station street map:http://www.mtr.com.hk/jplanner/images/maps/tsw.pdf
Hope above information can help you!