Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"using java java snippets" » "using data java snippets"
"vi luong duy snippets" » "vi luong duc snippets", "vi luong du snippets", "vi luong quy snippets", "dai luong duy snippets", "van luong duy snippets", "hai luong duy snippets"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"vi luong duy snippets\") OR (\"using java java snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( vi luong duy snippets ) OR ( using java java snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("vi luong duy snippets") OR ("using java java snippets"))) OR ("locating bug core snippets"))*.