Google changes the ranking depending on a lot of things, whether you're logged in to Google or a Google service such as Gmail or YouTube, cookies stored, previous browsing history, etc. etc. it's why you need to use an incognito tab in Chrome. However, even absolute rankings can change minute-by-minute, depending on the popularity of the keyword. It's also academic as "gay thailand" in this context is a very weak keyword, no-one searching for a hook-up or a date would type that. If you search for "gay thailand hookup" or "gay thailand dating" using an incognito tab in Chrome you'll find that this site appears many pages in, if it ranks at all.