related.php - filters similar job names

$category $ post_1 merged

• $category = 'Chemical Engineer'
• $post_1 = Chemical Engineer, AO, JE, Clerk, MTS

Then

• Final Result will be Chemical Engineer, AO, JE, Clerk, MTS
• Why Needed?
• On Chemical Engineering Jobs Page
• I want to show the profile Chemical Engineer first then other jobs follows.