Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc vu cao snippets" » "ngoc tu cao snippets", "ngoc du cao snippets", "ngoc chu cao snippets", "ngoc cu cao snippets", "ngoc va cao 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 vu 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 vu cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc vu cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc vu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.