Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"using nam phan snippets" » "using a phan snippets", "sung nam phan snippets", "uong nam phan snippets", "using dam phan snippets", "using nam thanh snippets", "using nam thang snippets"
"locating bug core snippets" » "locating bug code snippets"

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

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