Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam tra hon snippets" » "nam tro hon snippets", "nam thai hon snippets", "dam trao hon snippets", "nam tra mon snippets", "nam tran hong snippets", "nam tra thong 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 tra hon 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 tra hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam tra hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam tra hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.