Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam dao du snippets" » "nam dan du snippets", "nam sao du snippets", "nam cao du snippets", "nam dao duc snippets", "nam dao duy snippets", "nam dao do 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: (((("nam dao 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: (((("nam dao du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam dao du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam dao du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.