Perhaps you should try some spelling variations:
"vi ung data slippers" » "vi using data slippers", "vi dung dat slippers", "vi big data slippers", "va ung data slippers", "vi luong data slippers", "vi trung data slippers", "vi ung data slippery", "vi ung data grippers"
"using a java snippets" » "using _ java 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using a java snippets") or ("vi ung data slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a java snippets") OR ("vi ung data slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using a java snippets ) or ( vi ung data slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using a java snippets") or ("vi ung data slippers"))) or ("locating bug code snippets"))*.