Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luu nhat den snippets" » "luc nhat den snippets", "lu nhat den snippets", "luu chat den snippets", "luu nhat de snippets", "luu chat dien snippets", "luu nhat danh 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: (((("luu nhat den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luu nhat den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luu nhat den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luu nhat den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.