Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong hung o2 snippets" » "dong huong o2 snippets", "dang hung o2 snippets", "cong hung o2 snippets", "dong hang o2 snippets", "dong hung hoa 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: (((("dong hung 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: (((("dong hung o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong hung o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong hung o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.