Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quoc co he snippets" » "quoc cao he snippets", "quoc cho he snippets", "duoc co he snippets", "quoc co che snippets", "quoc co e 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: (((("quoc co he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quoc co he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quoc co he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quoc co he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.