Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tuan anh du snippets" » "tuan anh duc snippets", "tuan danh du snippets", "tuan anh d snippets", "quan anh du snippets", "tran anh du snippets", "luan anh du 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: (((("tuan anh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tuan anh du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tuan anh du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tuan anh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.