Perhaps you should try some spelling variations:
"va duong land snippets" » "va dung land snippets", "va duong van snippets", "va duong manh snippets", "van duong land snippets", "va tuong land snippets", "va huong land snippets", "va duong land slippers"
"using java java snippets" » "using data java snippets", "using java java 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: (((("va duong land snippets") or ("using java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va duong land snippets") OR ("using java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( va duong land snippets ) or ( using java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("va duong land snippets") or ("using java java snippets"))) or ("locating bug code snippets"))*.