Not much of a emoticon user, but I use a text smiley

'

'or frownie

'

' to keep from having to scroll through and find one that meets my emotional state.
Sometimes I feel somewhere in between, like :/ or :>) but those do not translate.
1) Is there a guide on the text that is translated to little graphics somewhere ?
2) Say I want to use graphics for a burnout or powerslide or a donut... I used the Smiley icon then searched

for "donut" and noticed a "bagel" instead.

.