Performance marketing network Miva is launching a keyword service - Miva Match - to help advertisers on its network generate more qualified leads, reports DM News. The service expands search results by more broadly matching them to advertisers' keywords - e.g., "used book store" would return close matches such as "used books" instead of just the exact term. Advertisers would be able to track exact matches and "Miva Matches" separately and can control settings by keyword or an entire account.