Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoang hat do snippets" » "hoang nhat do snippets", "hoang hai do snippets", "hoang ha do snippets", "hoang hat doi snippets", "hoang hat dao snippets", "hoang hat de 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: (((("hoang hat 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: (((("hoang hat do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoang hat do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoang hat do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.