Sometime you have classes like 'myclass-1" "myclass-2" and this may often be the case if you are using a WordPress plugin that spews out multiple divs with class names that are incrementally different. That can be a real pain, but thankfully you can still target them with a single line of CSS using the 'CSS3 [attribute*=value] Selector'. Here's the CSS:-
In the example above any class containing the syntax "part-of-class" will have red text. It's so simple and also supported on all major browsers.