Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hao van do snippets" » "dao van do snippets", "ho van do snippets", "cao van do snippets", "hao van dao snippets", "hao van de snippets", "hao van du 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: (((("hao van 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: (((("hao van do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hao van do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hao van do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.