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