Perhaps you should try some spelling variations:
"dang java java snippets" » "dang va java snippets"
"cong danh trac slippers" » "cuong danh trac slippers", "cong dan trac slippers", "cong thanh trac slippers", "cong anh trac slippers", "cong dang tran slippers", "cong danh thuc slippers", "cong danh trac slippery", "cong danh trac grippers"
"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: (((("dang java java snippets") or ("cong danh trac slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang java java snippets") OR ("cong danh trac slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang java java snippets ) or ( cong danh trac slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang java java snippets") or ("cong danh trac slippers"))) or ("locating bug code snippets"))*.