Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dai nhat den snippets" » "dang nhat den snippets", "moi nhat den snippets", "dai han den snippets", "dai nhat de snippets", "dai chat dien snippets", "dai 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: (((("dai 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: (((("dai nhat den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dai nhat den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dai nhat den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.