Get error when search query run in loop

when i have serach i have get sql error.

SELECT * FROM employee_info WHERE 1  AND ( ( key_skills LIKE '%PHP%' OR  job_title LIKE '%PHP%' OR  current_designation LIKE '%PHP%' OR  company_name LIKE '%PHP%' OR  objective LIKE '%PHP%' OR  resum_headline LIKE '%PHP%' OR  job_responsibility LIKE '%PHP%' OR  institute LIKE '%PHP%' OR  institute LIKE '%PHP%') OR ( key_skills LIKE '%Java%' OR  job_title LIKE '%Java%' OR  current_designation LIKE '%Java%' OR  company_name LIKE '%Java%' OR  objective LIKE '%Java%' OR  resum_headline LIKE '%Java%' OR  job_responsibility LIKE '%Java%' OR  institute LIKE '%Java%' OR  institute LIKE '%Java%') OR ( key_skills LIKE '%HTML%' OR  job_title LIKE '%HTML%' OR  current_designation LIKE '%HTML%' OR  company_name LIKE '%HTML%' OR  objective LIKE '%HTML%' OR  resum_headline LIKE '%HTML%' OR  job_responsibility LIKE '%HTML%' OR  institute LIKE '%HTML%' OR  institute LIKE '%HTML%') )  AND total_experience < 2 GROUP BY  uid DESC UNION (SELECT * FROM prev_companies WHERE pre_company_name LIKE '%PHP%' OR pre_industry LIKE '%PHP%' OR pre_functional_area LIKE '%PHP%' OR        pre_responsibility LIKE '%PHP%') OR (SELECT * FROM prev_companies WHERE pre_company_name LIKE '%Java%' OR pre_industry LIKE '%Java%' OR pre_functional_area LIKE '%Java%' OR        pre_responsibility LIKE '%Java%') OR (SELECT * FROM prev_companies WHERE pre_company_name LIKE '%HTML%' OR pre_industry LIKE '%HTML%' OR pre_functional_area LIKE '%HTML%' OR        pre_responsibility LIKE '%HTML%')You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'OR (SELECT * FROM prev_companies WHERE pre_company_name LIKE '%Java%' OR pre_ind' at line 1