Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh he noi snippets" » "danh het noi snippets", "dan he noi snippets", "hanh he noi snippets", "danh ha noi snippets", "danh he moi snippets", "danh ghep noi 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: (((("danh he noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh he noi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh he noi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh he noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.