(Maybe there should be some site-related subforum?)
Why is there the annoying search limitation:
Pretty many names in Linux are short. Notice: EACH word in searc must be at least 5 characters.The following words in your search query were ignored because they are too common words: nemo.
You must specify at least one word to search for. Each word must consist of at least 5 characters and must not contain more than 14 characters excluding wildcards.
The same problem with "smb.conf":
The following words in your search query were ignored because they are too common words: smb conf.
You must specify at least one word to search for. Each word must consist of at least 5 characters and must not contain more than 14 characters excluding wildcards.