Perhaps you should try some spelling variations:
"vi quan lan snippets" » "vi quan luan snippets", "vi quan lang snippets", "vi quan van snippets", "va quan lan snippets", "ve quan lan snippets", "vo quan lan snippets", "vi quan lan slippers"
"using low java snippets" » "using low 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: (((("vi quan lan snippets") or ("using low java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vi quan lan snippets") OR ("using low java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vi quan lan snippets ) or ( using low java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vi quan lan snippets") or ("using low java snippets"))) or ("locating bug code snippets"))*.