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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va trinh toan slippers") OR ("using java java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( va trinh toan slippers ) or ( using java java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("va trinh toan slippers") or ("using java java snippets"))) or ("locating bug code snippets"))*.