Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan hong o2 snippets" » "phan cong o2 snippets", "pham hong o2 snippets", "phan song o2 snippets", "phan hang o2 snippets", "phan hong son 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: (((("phan hong o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan hong o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan hong o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan hong o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.