Which sign is for separate word in google search? [closed]

[colemanhyena]

\[code\]"." "," ";" "_" ":"\[/code\]From signs above, which one Google Search use in parsing process.for example:\[code\]<title>hello stack overflow<title><title>hello;stack; overflow<title><title>hello, stack, overflow<title>...\[/code\]Google algorithm might be parsed to:\[code\][hello, stack, overflow]\[/code\]What is the best way to optimize parameters, text to compatible with google search?