Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat duy den snippets" » "hat dua den snippets", "hat dum den snippets", "pham duy den snippets", "hat day den snippets", "hat duy de snippets", "hat duy dung 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 duy den 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 duy den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat duy den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat duy den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.