Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"trau cua he snippets" » "tru cua he snippets", "tranh cua he snippets", "tu cua he snippets", "trau cua che snippets", "trau cua te snippets", "trau cua le 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: (((("trau cua he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trau cua he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trau cua he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trau cua he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.