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