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