VG tends to offer somewhat conservative dividend-paying funds, my assumption has always been diversification trumps specific strategies in VG's eyes. Understandable.
VG offers 3 dividend-oriented funds:
1) High Dividend Yield Index fund: It focuses on high yielding stocks.
2) Dividend Appreciation Index fund: It focuses on dividend growers, not necessarily the same as high yielders.
3) Equity Income: It focuses on high yield, dividend growers, and deeper value stocks which may not be high yielding nor dividend growers.
I use Equity Income. Another fund you might take a look at is Wellesley Income, but it holds about 60% in bonds and I'm not sure you want any more bonds.
If you're after really high yield you're going to have to go outside VG, but you will pay more.
Good Luck, Ken.