When I tried to use the Search articles API service, I found that the Seearch interface could not return the correct article information based on the keyword

And I made sure I did it a long time after the article had been updated

Can you help me to confirm the reason of this issue?

There is the article after updated title and conent :

There is my request result:

But when I try to change the keyword , the newest result will be returned like tbelow: