Perhaps you should try some spelling variations:
"vien truong va snippets" » "mien trung va snippets", "vien thong va snippets", "bien trong va snippets", "vien truong dai snippets", "vien truong cao snippets", "vien truong dao snippets", "vien truong va slippers"
"using real java snippets" » "using metal java snippets", "using raw java snippets", "using real 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: (((("vien truong va snippets") or ("using real java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vien truong va snippets") OR ("using real java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vien truong va snippets ) or ( using real java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vien truong va snippets") or ("using real java snippets"))) or ("locating bug code snippets"))*.