Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam trong du snippets" » "nam trung du snippets", "cay trong du snippets", "nam trong dau snippets", "nam trong dua snippets", "nam trong su 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: (((("nam trong du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nam trong du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam trong du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam trong du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.