HTML Full name pattern?

I'm looking for a html5 full name pattern. Example result: "Đoàn Việt"

1. exclude spaces at first and last
2. exclude special character
3. include at least 1 space between

I found these for 1 and 2: ((?!(^[ \s]+|[ \s]+$)|([0-9`~!@#$%^&()-_=+[{]}\|;:'\x22,<.>/?])).)

And i found this one for 3: (?=.*\s).{1,}

But when i combine these pattern like: ((?!(^[ \s]+|[ \s]+$)|([0-9`~!@#$%^&()-_=+[{]}\|;:'\x22,<.>/?]))(?=.\s).{1,}.)*

It doesn't work! :(