Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao vung de snippets" » "dan vung de snippets", "dao cuong de snippets", "dao van de snippets", "dao dung de snippets", "dao vang de snippets", "dao vung re 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: (((("dao vung de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao vung de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao vung de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao vung de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.