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