my history keeps deleting itself

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
my history keeps deleting itself	1.78	0.6	5618	79	32
my	0.45	0.1	169	79	2
history	0.36	0.2	1484	2	7
keeps	1.35	0.7	1374	24	5
deleting	1.7	0.9	1346	63	8
itself	0.8	0.6	2012	33	6

Keyword	CPC	PCC	Volume	Score
my history keeps deleting itself	0.39	0.8	8005	97
my browsing history keeps deleting itself	1.61	1	3751	99
why does my history keep deleting itself	0.03	0.5	5779	5
why isn't my history deleting	0.44	1	5787	92
why is my history not deleting	1.55	0.7	8482	28
why is my history automatically deleting	1.4	0.2	4900	33
why can i not delete my history	0.82	0.7	3310	78
why doesn't my history delete	0.28	0.7	6572	73
why will my history not delete	1.16	0.5	2221	18
why won't my history delete	1.85	0.4	7597	26
why won't it let you delete history	0.41	0.1	6189	77