Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan song o2 snippets" » "phan cong o2 snippets", "phan xuong o2 snippets", "phan ung o2 snippets", "phan song con snippets", "phan song don snippets", "phan song toi 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 song 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 song o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan song o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan song o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.