The reason why I am so lucky or successful is because of you . you may have done sth for me , or courage me . or just Mabye you bring me luck even though you have done noting for me .

Anita 你怎么知道官话指南呢?我想关于那本书问你们几个问题。

托福: 依托別人的福氣，使自己幸運。常用於回話時的謙詞。如：官話指南˙卷一˙應對須知：「您這一向貴恙都好了麼。托福都好了。」 「託福，託福，這一向還好。」亦作「託福」、「託庇」。

Hi~ 托福托福 does not exit in chinese language as far as I know. I think you mean 托您的福. This is just what people would say when they are complimented . (it means "you have been of great help to me". However, it is just rhetoric, people are usually not honest when they say this) Example: A: Congratulations! Your business was a great success last year! B: Thank you. 托您的福, 托您的福.