How the make every single coupon page indexed by google?

I have newly built a coupon site but only the homepage and some categories pages are searchable via google.

I turned on the index function in the all in one seo wordpress plugin, but seems my coupons pages aren’t appear in search result. It is still the same even after I submitted my homepage to google webmaster.

Does anyone have the same issue and is there anyway to fix it?

Thanks all!