flex not taking full height

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
flex not taking full height	1.7	1	4126	47	27
flex	0.06	0.8	5134	48	4
not	0.93	0.9	5325	79	3
taking	1.15	0.6	5656	93	6
full	0.44	1	4850	22	4
height	0.08	0.5	3557	95	6

Keyword	CPC	PCC	Volume	Score
flex not taking full height	1.33	0.9	4705	47
flex div not taking full height	0.44	0.7	4702	57
flex take full height	1.11	1	164	69
flex height 100 not working	0.93	0.2	3561	32
flex grow not filling height	1.35	0.6	6905	13
flex item full height	1.88	0.5	6869	87
flex fill remaining height	0.06	0.9	6163	75
flex 1 height 0	1.34	1	9731	66
height 100% in flex	0.25	0.8	467	56
flex:1 height	1.55	0.2	7331	19
flex taking full width	0.44	0.4	6417	89
flex max-height	0.98	0.3	7729	25
flex height fit content	1.53	0.4	1725	20
flex:1 max-height	1.72	0.1	2126	61
flex items same height	1.95	0.7	9213	28
display flex full height	1.87	0.3	211	44
flex min-height 0	1.92	0.2	1950	85
flex make items same height	0.48	0.4	8115	54
height of flex item	1.69	1	5918	82
width not working in flex	1.86	0.9	6877	42