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