How to search "tags" in MySQL? -

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if have table on db called product_tags 2 fields: tag_id , tag_name

here schema:

create table `product_tags` (  `tag_id` int(11) not null auto_increment,  `tag_name` varchar(255) not null,  primary key  (`tag_id`),  unique key `tag_name` (`tag_name`) ) engine=myisam auto_increment=84 default charset=utf8

say here tags in it:

  • yellow gold
  • yellow diamond
  • white gold
  • rose gold
  • band
  • diamond
  • blue diamond
  • pink diamond
  • black diamond

and want search on string "yellow gold diamond band"

i want pull following tags:

  • yellow gold
  • band
  • diamond

because tags in string. yellow , diamond both in string not yellow diamond tag should ignored.

-additionally if possible

if did search "yellow gold blue diamond band"

i want pull following tags:

  • yellow gold
  • band
  • blue diamond

the diamond tag ignored because blue diamond tag match.

how can this?

edit: 

select    *     product_tags p    instr('yellow gold diamond band', p.tag_name) > 0

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