from shenzhen (lowu) to Tianhe Teemal Guangzhou

From Luohu or Qiaoshe Bus Station, there is no buses for GZ Tianhe Bus Station.
I think you can choose to take the bullet trains from SZ Railway Station to GZ East Railway Station. Upon reaching the east railway station, you can take the GZ Subway line 3 to get to Tiyu Xilu Station. Get out of the station from Exit E and then walk to find the Teemall (Tian He Cheng).
The bullet trains take about one hour and twenty mintues and the ticket fare is around 80RMB for second class seat and around 100RMB for first class seat.