Perhaps you should try some spelling variations:
"python using real snippets" » "python using metal snippets", "python using raw snippets"
"dung tri cua snippets" » "dung tai cua snippets", "dung tren cua snippets", "nhung tri cua 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: (((("python using real snippets") or ("dung tri cua snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using real snippets") OR ("dung tri cua snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using real snippets ) or ( dung tri cua snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using real snippets") or ("dung tri cua snippets"))) or ("locating bug code snippets"))*.