Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc duc cao snippets" » "ngo duc cao snippets", "ngoc dung cao snippets", "ngoc de cao snippets", "ngoc duc dao snippets", "ngoc doc cao snippets", "ngoc duc bao 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: (((("ngoc duc cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngoc duc cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc duc cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc duc cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.