Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh soi co snippets" » "danh sai co snippets", "dinh so co snippets", "anh son co snippets", "danh moi co snippets", "danh hoi co snippets", "danh doi co 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 soi co 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 soi co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh soi co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh soi co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.