Perhaps you should try some spelling variations:
"using java java grippers" » "using data java grippers", "using java java slippers"
"van luong du snippets" » "van duong du snippets", "van cuong du snippets", "nang luong du snippets", "van luong duc snippets", "van luong duy snippets", "van luong tu snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

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