Perhaps you should try some spelling variations:
"van dung quang snippets" » "van dang quang snippets", "van luong quang snippets", "van dung luan snippets", "van dong quang snippets", "xay dung quang snippets", "tin dung quang snippets", "van dung quang 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.

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