Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi van hong snippets" » "phi van phong snippets", "phi van hoang snippets", "phi van huong snippets", "phi san hong snippets", "thi van hong snippets", "phi va hong 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: (((("phi van hong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phi van hong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi van hong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi van hong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.