Suggestion 1 - you'll get more responses with a less vague title to your post. Most folks won't read one titled "help".

Suggestion 2 - I'm not familiar with expertflyer.com and too lazy to look. I'll assume that you loaded dates, departure city and destination. I'll also assume it told you what airline will fly you there for the least $. Try that airline's website and see if you can get a fare match. Bingo.