How to send text to some HTML elements?

I have been having trouble on referring to a search box on a website through Selenium in VBA. The HTML code of the box is:

<input type = "search" class ="form-control input-sm"
placeholder aria-controls="result_table"> ==$0

I have tried

bot.findElementByCssSelector(".form-control").SendKeys ("werresf")
bot.findElementByCssSelector(".form-control.input-sm").SendKeys ("werresf")
bot.findElementByCssSelector(".input-sm").SendKeys ("werresf")
bot.findElementByCssSelector(".form-control input-sm").SendKeys ("werresf")
bot.findElementByClassName("form-control input-sm").SendKeys ("werresf")

But none of them seems to work. Any help is greatly appreciated.