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