Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc han ho snippets" » "duc phan ho snippets", "duc hanh ho snippets", "duc hoan ho snippets", "duc han cho snippets", "duc can ho snippets", "duc hen ho 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: (((("duc han ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc han ho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc han ho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc han ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.