Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"using java java snippets" » "using data java snippets"
"vi trinh xa slippery" » "vi tinh xa slippery", "va trinh xa slippery", "viet trinh xa slippery", "vi trinh xay slippery", "vi trinh xac slippery", "vi trinh da slippery", "vi trinh xa slippers"

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 xa slippery\") OR (\"using java java snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( vi trinh xa slippery ) OR ( using java java snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("vi trinh xa slippery") OR ("using java java snippets"))) OR ("locating bug core snippets"))*.