Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi van tre snippets" » "phi san tre snippets", "thi van tre snippets", "phi va tre snippets", "phi van tren snippets", "phi van te snippets", "phi ban tre 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 tre 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 tre snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi van tre snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi van tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.