Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tuan tran du snippets" » "tan tran du snippets", "toan tran du snippets", "xuan tran du snippets", "tuan tran duc snippets", "tuan tran duy snippets", "tuan trang 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 tran 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 tran du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tuan tran du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tuan tran du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.