Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan dan ong snippets" » "luan danh ong snippets", "luan van ong snippets", "luat dan ong snippets", "luan dan dong snippets", "luan dang cong snippets", "luan dan trong 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: (((("luan dan ong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan dan ong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan dan ong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan dan ong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.