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"
"va trung va snippets" » "ba trung va snippets", "ha trung va snippets", "va thuong va snippets", "va truong va snippets", "va trang va snippets", "va trung ha snippets"

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

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