Perhaps you should try some spelling variations:
"vi trung java slippers" » "vi trung va slippers", "vi trinh java slippers", "va trung java slippers", "viet trung java slippers", "vien trung java slippers", "vi trung java slippery", "vi trung java grippers"
"using a java snippets" » "using _ 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("vi trung java slippers") or ("using a java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vi trung java slippers") OR ("using a java snippets"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( vi trung java slippers ) or ( using a java snippets ))) or ( locating bug code snippets ))*.