Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lieu thi da snippets" » "lieu tai da snippets", "sieu thi da snippets", "kieu thi da snippets", "lieu thi dai snippets", "lieu thi dua snippets", "lieu thi 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: (((("lieu thi da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lieu thi da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lieu thi da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lieu thi da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.