Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao luc cua snippets" » "dao duc cua snippets", "dao tuc cua snippets", "bao luc cua snippets", "dao luc chua snippets", "dao luc nua 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 luc cua 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 luc cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao luc cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao luc cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.