Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets"
"vi trinh cac slippers" » "vi trinh cau slippers", "vi trinh chat slippers", "vi trinh chao slippers", "vi tinh cac slippers", "va trinh cac slippers", "viet trinh cac slippers", "vi trinh cac slippery", "vi trinh cac grippers"
"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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"vi trinh cac slippers\") OR (\"using java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( vi trinh cac slippers ) OR ( using java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("vi trinh cac slippers") OR ("using java java snippets"))) OR ("locating bug code snippets"))*.