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"
"vien tran van snippets" » "bien tran van snippets", "vien than van snippets", "vien tren van snippets", "vien luan van 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 tran van snippets") OR ("using real java snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"vien tran van snippets\") OR (\"using real java snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( vien tran van snippets ) OR ( using real java snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vien tran van snippets") OR ("using real java snippets"))) OR ("locating bug core snippets"))*.