Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan khi con snippets" » "doan thi con snippets", "toan khi con snippets", "doan khac con snippets", "doan khi cong snippets", "doan chi con snippets", "doan khi co 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 khi con 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 khi con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan khi con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan khi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.