Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lam tuan do snippets" » "lam tan do snippets", "nam thuan do snippets", "pham tuan do snippets", "lam toan do snippets", "lam truan doi snippets", "lam quan doi 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: (((("lam tuan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lam tuan do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lam tuan do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lam tuan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.