Please find an Alanon meeting to go to.
You have to focus on what you can change (you) and what you can't (him). By learning about yourself and the disease will help you manage him and your life and also enable you to make decisions about what your next steps are.
He has a disease which he may or may not be aware of. Has he recognised he is an Alcoholic?
He will need to decide for himself what to do about his disease. It can be managed (AA, 12 step program) but he will have to make the decision not you for him. Often Alcoholics have to reach rock bottom i.e. end up in hospital, lose job/wife etc before they realise the disease is making their lives unmanageable.
If you find bottles leave them there (they are his mess), don't buy alcohol for him (enabling), don't go looking for bottles - what's the point? You aren't hurting him, only yourself.
But remember he is a nice, loving man, it's not his choice it's an illness,he is sick.
The disease is a family disease and his making you sick too, which is why you feel unhappy, stressed etc, but ALanon will help you. In the way AA could help him.
Regarding the lies. Remember pretty much every word that comes of an alcoholics mouth is a lie.
And don't bother Googling anymore. I can tell you, he is an alcoholic. If he is hiding bottles he is.
Don't waste any of your energy getting angry with him or shouting because all you are doing is making yourself feel worse and in a way your enabling him to drink, as he now has a reason to i.e I may as well have a drink because she's angry with me anyway.
Just bite your tongue, leave the room and do something nice with your children.
Remember, this too will pass :)