Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan thi da snippets" » "dan thi da snippets", "doanh tai da snippets", "hoang thi da snippets", "doan thi dai snippets", "doan thi dua snippets", "doan 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: (((("doan 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: (((("doan thi da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan thi da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan thi da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.