Perhaps you should try some spelling variations:
"using a java snippets" » "using _ java snippets", "using a java slippers"
"vien thong tin snippets" » "viet thong tin snippets", "bien thong tin snippets", "vien trong tin snippets", "vien thong tinh snippets", "vien thong tin slippers"
"locating bug code snippets" » "locatinhg 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 thong tin snippets") or ("using a java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vien thong tin snippets") OR ("using a java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vien thong tin snippets ) or ( using a java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vien thong tin snippets") or ("using a java snippets"))) or ("locating bug code snippets"))*.