Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc tuan vo snippets" » "ngo xuan vo snippets", "ngoc than vo snippets", "ngoc tuan do snippets", "ngoc toan von 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 tuan 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: (((("ngoc tuan vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc tuan vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc tuan vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.