five to ten years in advance

five to ten years修饰介词短语in advance， 而不是后者修饰前者。这类似于 five years before liberation。前者修饰后者，而不是后者修饰前者。

Countries （主语）//（主语的后置定语）looking to raise their retirement ages //（修饰谓语动词的状语）typically//（谓语动词） make //（宾语）their intentions//（宾语补足语） known //（时间状语）five to ten years in advance.

希望提高退休年龄的国家通常会提前五到十年宣布她们自己的意图/打算。

look vt.打算；准备； 计划（英文解释：If you are looking to do something, you are aiming to do it. ）

look to do sth打算/计划做某事

We're not looking to make a fortune. 

我们没打算大赚一笔。

They are young mums looking to get fit after having kids. 

她们是生完孩子后打算瘦身的年轻妈妈们。