Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quoc co con snippets" » "quoc cao con snippets", "quoc cho con snippets", "duoc co con snippets", "quoc co co snippets", "quoc co don 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 con 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 con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quoc co con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quoc co con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.