Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duoc van du snippets" » "duoc va du snippets", "duc van du snippets", "duoc ban du snippets", "duoc van duy snippets", "duoc van dau snippets", "duoc 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: (((("duoc 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: (((("duoc van du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duoc van du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoc van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.