Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"so phan long snippets" » "so phan luong snippets", "so phan cong snippets", "so phan song snippets", "co phan long snippets", "hoc phan long snippets", "hoa phan long 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: (((("so phan long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("so phan long snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( so phan long snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("so phan long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.