Perhaps you should try some spelling variations:
"dong thanh o snippets" » "truong thanh o snippets", "dong thanh do snippets", "dong thanh ho snippets", "dong thanh vo snippets"
"python using sat snippets" » "python using data snippets", "python using a snippets", "python using raw snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using sat snippets") or ("dong thanh o snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using sat snippets") OR ("dong thanh o snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using sat snippets ) or ( dong thanh o snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using sat snippets") or ("dong thanh o snippets"))) or ("locating bug code snippets"))*.