Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dau tranh de snippets" » "can tranh de snippets", "dau tren de snippets", "dau trong de snippets", "dau thanh de snippets", "dau trang de snippets", "dau tranh dau 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 tranh de 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 tranh de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dau tranh de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dau tranh de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.