dont trust such people as praise to your face but speak ill of you behind your back

don't trust the people who praise to your face but speak ill of you behind your back.这样就可以用who引导了。
SUCH AS 结构和从句有重复，只能用一种。

别相信那些当面表扬你而背后却说你坏话的人。

你知道是such as 就应该用as呀
除非你把such去掉用who也对