Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duong nhi de snippets" » "duong thi de snippets", "duong loi de snippets", "duong nhi den snippets", "duong khi de snippets", "duong noi de 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: (((("duong nhi 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: (((("duong nhi de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong nhi de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong nhi de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.