Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"minh van du snippets" » "dinh van du snippets", "minh va du snippets", "vinh van du snippets", "minh van duy snippets", "minh van dau snippets", "minh van 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: (((("minh van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("minh van du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( minh van du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("minh van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.