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"
"vi trang va snippets" » "va trang va snippets", "vi trung va snippets", "viet trang va snippets", "vi tran van snippets", "vi hang va snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("vi trang va snippets") OR ("using real java snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"vi trang va snippets\") OR (\"using real java snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( vi trang va snippets ) OR ( using real java snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vi trang va snippets") OR ("using real java snippets"))) OR ("locating bug core snippets"))*.