Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dat danh du snippets" » "dat anh du snippets", "dai danh du snippets", "dao danh du snippets", "dat danh dau snippets", "dat danh tu snippets", "dat dinh du 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: (((("dat danh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dat danh du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dat danh du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dat danh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.