So if you live in CA you must live in Eureka, because where else could you possibly live? And if you live in Eureka, what are you doing growing bermuda?

Or do you live somewhere else in CA? We really need to know because CA is a big place. The Bay Area is a big place as is SoCal. So please be specific.

If you need to kill weeds, use a herbicide and then figure out what you're doing wrong, because a good bermuda lawn doesn't have weeds. If you need a fertilizer, use a fertilizer. But don't try to mix the two for the reason listed above. If you are not fertilizing once a month with a high nitrogen fertilizer, then that's what you're doing wrong, and the grass got thin.

Memorize the Bermuda Bible.

The grass is in Bakersfield Ca. Can you recommend a weed killer from home depot?

For broadleaf weeds, spot spray with Weed-B-Gone. If you want something stronger, Weed-B-Gone Chickweed, Clover, & Oxalis Killer. Look for it by the full name.

For grassy weeds, the easy way is to spot spray with Round Up and let the bermuda fill back in. There are some specialty sprays that will take out certain weeds but we'd need to know what they were.

I thought for grassy weeds, you use this Image product?

Here is a link that might be useful: Image nutsedge killer

Dave-
I didn't think the Weed-b-gone CC&O was recommended for Bermuda. I was hesitant to use it with this warning on the label,

"Where Not to Use
Do not use this product for controlling weeds in flower or vegetable beds or around shrubs or ornamental plantings.
Do not use on St. Augustine, Centipede, or Bermudagrass lawns. "

controlled spot spraying should not be an issue if you get the weed only