Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"viet van tin snippets" » "viet nam tin snippets", "viet anh tin snippets", "viet ha tin snippets", "viet van tien snippets", "viet van tan snippets", "viet van thinh snippets", "viet van tin slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("viet van tin snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("viet van tin snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet van tin snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet van tin snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.