Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"viet trong van snippets" » "viet trung van snippets", "viet thong van snippets", "viet huong van snippets", "viet trong cac snippets"
"using real java snippets" » "using metal java snippets", "using raw java snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("viet 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: (((("viet trong van snippets") OR ("using real java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( viet trong van snippets ) or ( using real java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet trong van snippets") or ("using real java snippets"))) or ("locating bug core snippets"))*.