Yes, thats my fault. Whats happening under the hood is searchcode is trying to match "MongoDBObject find" exactly, where as Github is going for a looser but phrase heavy search.
Its something I am going to change based on feedback as clearly what I am doing is not what people are expecting. I will however make it an option, so you can chose exact match (current) or loose.
I am modifying it now to be a little more like github's.
I had planned on removing the highlights too, its going to be modified to just affect the portion where the match occurred. Its mostly there as a hangover from when I was not actually highlighting the actual match and just the line.
Its something I am going to change based on feedback as clearly what I am doing is not what people are expecting. I will however make it an option, so you can chose exact match (current) or loose.