Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den tuan hoi snippets" » "den tran hoi snippets", "den thanh hoi snippets", "doan tuan hoi snippets", "den tan hoi snippets", "den quang hoi snippets", "den tuan hoan 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: (((("den tuan hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den tuan hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den tuan hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den tuan hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.