Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngan van du snippets" » "nhan van du snippets", "ngan han du snippets", "ngan hang du snippets", "ngan van duy snippets", "ngan van dau snippets", "ngan van de 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: (((("ngan van 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: (((("ngan van du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngan van du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngan van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.