Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"trau cua can snippets" » "tru cua can snippets", "tranh cua can snippets", "tu cua can snippets", "trau cua cac snippets", "trau cua ban snippets", "trau cua dan 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 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: (((("trau cua can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trau cua can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trau cua can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.