Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan thuc son snippets" » "dan toc son snippets", "am thuc son snippets", "dan thuc san snippets", "dan thuc con snippets", "dan thuc so 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 thuc son 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 thuc son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan thuc son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan thuc son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.