I can't help saying:Thank you too much!

1。语法上没有问题但表达有些中式英语的味道。can't help doing是“忍不住做某事”的意思。可以简单地说I must say thank you very much。或者I really have to thank you。
2。“正如 就像”的意思可以用“as”引导的从句表达
比如 as he says 正如他说
as the old saying goes 正如古语所说
as the research shows正如研究显示