Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan dung cu snippets" » "lan dung cu snippets", "luan dong cu snippets", "luan hung cu snippets", "luan dung cua snippets", "luan dung co snippets", "luan dung cho 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 dung cu 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 dung cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan dung cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan dung cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.