Perhaps you should try some spelling variations:
"locating bug code slippers" » "locating bug code snippets", "locating bung code slippers", "locating bugs code slippers"
"data using java snippets" » "data using data snippets"
"dong danh viet snippets" » "dong doanh viet snippets", "dong anh viet snippets", "cong danh viet snippets", "dong ninh viet snippets", "dong nang viet 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 ("dong danh viet snippets"))) or ("locating bug code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("data using java snippets") OR ("dong danh viet snippets"))) OR ("locating bug code slippers")).
• Removing quotes may allow a broader search: (((( data using java snippets ) or ( dong danh viet snippets ))) or ( locating bug code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("data using java snippets") or ("dong danh viet snippets"))) or ("locating bug code slippers"))*.