Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dau len chi snippets" » "dam len chi snippets", "dau tien chi snippets", "dau luan chi snippets", "dau len choi snippets", "dau ben chi snippets", "dau le chi 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: (((("dau len chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dau len chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dau len chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dau len chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.