Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"dung nhat de snippets" » "dung nhan de snippets", "dang nhat de snippets", "dung nha de snippets", "dung nhat ve snippets", "dung nhat le snippets", "dung chat deo snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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