Perhaps you should try some spelling variations:
"using data java snippets" » "using java java snippets", "using sat java snippets", "missing data java snippets"
"doi khung cua snippets" » "doi khang cua snippets", "dai khung cua snippets", "voi khung cua snippets", "doi chung cua snippets", "doi khung luan snippets", "doi chung cu snippets"
"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: "((((\"using data java snippets\") OR (\"doi khung cua snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using data java snippets ) OR ( doi khung cua snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using data java snippets") OR ("doi khung cua snippets"))) OR ("locating bug code snippets"))*.