Not found 'Open browser' keyword in Selenium2Library

[HoangHo16]

After installing Selenium2Library library successfully,
I don't find some keywords like 'Open browser', 'Page should contain ...'
However, other keywords are visible, like 'Close browser', "Element should be enabel'..
It's so strange! Is the issue from driver of browsers?
Please help.
I'm using python 3.8.2 and Selenium2Library 3.3.0 and SeleniumLibrary 4.4.0