If you are using Indeed.com or other search engines, there is a means of searching by job title, company name, or keyword. Let's say you want to do land surveying. I entered "Surveyor" in "Texas" and scrolled through the listings, looking at the lower paying ones (most likely entry level) and came across "instrument man" . So then, I could use that as a search term - and found 25 listings! You could also read through a few of the job descriptions and see if other terms could be useful, such as "rodman." You could also search all the listings of the companies, and perhaps find an entry level position within the company, even if it is not exactly what you wanted. Perhaps it might be an administrative assistant working with officially submitting surveys to government agencies.
You can also be more specific, rather than just saying Texas, you could enter a city. And, you can even leave the keyword box empty, and just search for jobs in Mission TX! hit search, and filter boxes will appear directly below the keyword box. Narrow it down by mileage, "no experience necessary," how recently the job was posted (hint - lots of older postings are already filled, or perhaps not good jobs- try to look at newer postings first). Sometimes, it's just a matter of scrolling and reading, and thinking, wow, I never considered that!
This is a great question! One thing I would recommend is that instead of searching for specific job titles, consider your specific skills and interests and then ask what other job roles might also require those same skills and interests. It can be difficult to discover career opportunities that we don't know exist, but by asking the right question and going beyond the title, it is possible to search for something new.
I would also recommend researching companies in your industry and looking through their organizational charts to see what types of job roles they have within their company. You can network, job shadow, and get to know what these new careers entail.
Best of luck in your search!