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