Perhaps you should try some spelling variations:
"vi trinh quan slippery" » "vi tinh quang slippery", "vi trinh luat slippery", "vi trinh han slippery", "vi tinh quan slippery", "va trinh quan slippery", "viet trinh quan slippery", "vi trinh quan slippers"
"using java java snippets" » "using data java snippets", "using java java 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 quan slippery\") OR (\"using java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( vi trinh quan slippery ) OR ( using java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("vi trinh quan slippery") OR ("using java java snippets"))) OR ("locating bug code snippets"))*.