why won't my css stylesheet work

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why won't my css stylesheet work	0.88	0.3	2453	48	32
why	0.82	0.4	3889	66	3
won't	1.99	0.9	7164	34	5
my	0.69	0.8	1303	70	2
css	0.15	0.3	6148	12	3
stylesheet	1.13	0.4	9186	12	10
work	1.8	0.8	507	35	4

Keyword	CPC	PCC	Volume	Score
why won't my css stylesheet work	0.9	0.6	5437	32
css stylesheet not working	1.96	0.8	4773	21
why is my stylesheet not working	1.34	0.6	7232	13
why is my css style not working	0.28	0.8	2585	4
why my style.css not working	1.68	1	7809	20
why won't my css work	2	0.1	1195	14
why isn't my style sheet working	1.62	0.3	8702	9
css stylesheet not being applied	0.69	0.1	8573	98
why does my css not work	0.21	0.9	4651	47
why css styles is not applied	1.55	0.7	7318	35
why isn't my css working	0.33	0.6	531	57
why my css is not working	0.46	0.5	5699	26
how to use css stylesheet	1.55	0.2	4680	77
why is my stylesheet not linking	1.83	0.1	7171	13
style css stylesheet missing	1.74	0.1	6853	6
can't see css stylesheets in wordpress	1.88	0.2	3864	67
css class not working	0.83	0.1	2494	73