Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan dung tre snippets" » "van dung tre snippets", "tin dung tre snippets", "ap dung tre snippets", "dan dung tren snippets", "dan dung tri snippets", "dan dung tru 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: (((("dan dung tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan dung tre snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan dung tre snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan dung tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.