Finally, the search box is working. It is installed on the right side below 'follow'. It is programmed to search only posts within the blog. I am so happy that the search box is working. I have been trying to repair it ever since this blog was born.
Now, it is easier to look for posts through the search box. The labels/ tags are still there in case the search box experiences difficulties again.
Results will be displayed on the top of the page below the title.
Enjoy using the search box!