1. .name1.name2

means

    <div class="name1 name2">...</div>

a div or an element having both classes together.

2. .name1 .name2

means

          <div class="name1">
               <div class="name2">
                   ......
                </div>
            </div>

a div or an element which has a class name1 and any of its child nodes having class name2

1. .name1.name2

means a div or an element having both classes together, for example:

    <div class="name1 name2">...</div>

2. .name1 .name2

means a div or an element which has a class name1 and any of its child nodes having class name2

    <div class="name1">
        <div class="name2">
            ...
        </div>
    </div>

.name1.name2

means

    <div class="name1 name2">...</div>

a div or an element having both classes together.

.name1 .name2

means ......

a div or an element which has a class name1 and any of its child nodes having class name2

1. .name1.name2

means

    <div class="name1 name2">...</div>

a div or an element having both classes together.

2. .name1 .name2

means

          <div class="name1">
               <div class="name2">
                   ......
                </div>
            </div>

a div or an element which has a class name1 and any of its child nodes having class name2