Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"giac duoc vo snippets" » "giao duc vo snippets", "gia duc vo snippets", "giac duoc va snippets", "giac duoc co snippets", "giac duoc do 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: (((("giac duoc vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("giac duoc vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( giac duoc vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("giac duoc vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.