Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat duc hoan snippets" » "hat duc hoang snippets", "hat duc hoa snippets", "hat duc toan snippets", "hat dua hoan snippets", "hat dum hoan snippets", "pham duc hoan 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: (((("hat duc hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hat duc hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat duc hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat duc hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.