Improving Job Search Engines

Most job search engines use keyword searching. Because of this choice by job sites, search results are often meaningless. Usually this occurs because the search engine:

• Searches keywords in all parts of the job posting
• Uses unspecified boolean logic
• Offers filters that are not meaningful to the target users - job-seekers

Each of these could be easily remedied without making major changes to the sites or their search engines:

• There is no reason to not have an advanced search which allows the searcher to direct keywords to specific parts of a job posting - and no reason to not require job postings to have a well-defined structure. You should be able to specify search words for requirements, description, and job title.
• Allow users to specify phrase searching
• Clearly explain the default logic for multiple word searches - getting more results is less desirable than getting good results
• Allow users to specify the search logic in an advanced search - enough people understand set theory to use AND, OR, NOT; there are another large group that could correctly select the same logic when presented as "search for all of these terms", "search for any of these terms", "exclude results containing these terms".
• Add meaningful filters - date posted, closing date and location are meaningful. Industry is not. I would like to see the following: 
• If there is a place for job applicants to enter a security clearance - then include a filter in the search that allows users to exclude jobs that require security clearances above their level
• If there is a place for job applicants to enter skill tags - then include a filter in the search for skills that allows users to select jobs that match identified skills

Job sites could also ask employers to use standard job titles. It is not uncommon for a job seeker to need to search multiple job titles to find the right job function. An "analyst" or "researcher" may have the exact same job, but the titles are different. Variation in job titles becomes even more enigmatic when you consider most salary comparisons are based on job titles. It the job title doesn't match comparable jobs it is not clear what a fair market salary is. Or even if someone is qualified to fulfill the position.  And that can't be good for either the job seeker or the employer.