Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets"
"va trinh dan slippers" » "va trinh han slippers", "va trinh van slippers", "va trinh san slippers", "van trinh dan slippers", "va tinh dan slippers", "lap trinh dan slippers", "va trinh dan slippery", "va trinh dan grippers"
"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.

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