Javascript replace with Unicode character

[phpguru]

Here's my string:

[aaa:giải trí][bbb:thử nghiệm]

so, how can i replace "giải trí" by other string ?
i used \w , but nothing happend

[kyberfabrikken]

"[aaa:giải trí][bbb:thử nghiệm]".replace(new RegExp("giải trí"), "æblegrød")

Javascript uses unicode internally, so the only thing to watch out for, is that data gets transported correctly into javascript. Once it's in, all characters are equal.