Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong luc tom snippets" » "nang luc tom snippets", "dong luc tam snippets", "dong luc tham snippets", "dong luc tiem 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: (((("dong luc tom snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong luc tom snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong luc tom snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong luc tom snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.