Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngon tu doi snippets" » "ngoc tu doi snippets", "ngon ngu doi snippets", "ngon tu do snippets", "ngon te doi snippets", "ngon tu di 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: (((("ngon tu doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngon tu doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngon tu doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngon tu doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.