Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dat trieu do snippets" » "dat tieu do snippets", "dat tren do snippets", "dat hieu do snippets", "dat trien do snippets", "dat trieu dai snippets", "dat trien dot 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: (((("dat trieu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dat trieu do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dat trieu do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dat trieu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.