Thunderbird Global Challenge Lab

Librarians use "domain restriction" in Google all the time to vastly improve search results. For example:  site:co for Colombian sites, .mx for Mexico,  .gov for government, .org for nonprofits, .edu for university/college results. Example: agriculture site:vn will give you sites from Vietnam about the agriculture sector. vietnam agriculture site:gov will give you mainly US government websites, such as from the USDA's Foreign Agricultural Service.

Use quotes to string phrases together. For example, if you were searching for Filipino websites about bus rapid transit, you could try: 
"bus rapid transit" site:ph

Also:

• “filetype:” to restrict to certain types of files (.doc, .ppt, .pdf, etc.)
• Use “. .” to search on a range of values ($10 . . $50)
• * wildcard “drone * safety” will include phrases with anything where the * goes (including where there is nothing)
• AFTER:  command will search for sites with dates on or after the given year, for example:  Axon AFTER:1/1/2023

These techniques can be used alone or in combination:

drone technology site:gov

drone technology filetype:pdf

drone technology site:gov filetype:pdf AFTER:1/1/2015