Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"using real java snippets" » "using metal java snippets", "using raw java snippets"
"voi trong van snippets" » "doi trong van snippets", "hoi trong van snippets", "vai trong van snippets", "voi trong cac snippets"

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

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