Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets", "using java java slippers"
"vi trinh dan grippers" » "vi trinh han grippers", "vi trinh van grippers", "vi trinh san grippers", "vi tinh dan grippers", "va trinh dan grippers", "viet trinh dan grippers", "vi trinh dan slippers"
"locating bug code snippets" » "locating bug code slippers", "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.

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