Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tong tuan do snippets" » "trong tuan do snippets", "tong luan do snippets", "tong quan do snippets", "tong toan do snippets", "tong truan doi snippets", "tong quan doi 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: (((("tong tuan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tong tuan do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tong tuan do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tong tuan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.