Perhaps you should try some spelling variations:
"vi minh doanh slippery" » "vi kinh doanh slippery", "vi minh danh slippery", "vi minh doan slippery", "vi sinh doanh slippery", "vi tinh doanh slippery", "vu minh doanh slippery", "vi minh doanh 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 minh doanh slippery\") OR (\"using java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( vi minh doanh slippery ) OR ( using java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("vi minh doanh slippery") OR ("using java java snippets"))) OR ("locating bug code snippets"))*.