Perhaps you should try some spelling variations:
"vi trinh luan slippers" » "vi trinh luat slippers", "vi trinh quan slippers", "vi trinh han slippers", "vi tinh luan slippers", "va trinh luan slippers", "viet trinh luan slippers", "vi trinh luan slippery", "vi trinh luan 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.

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