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