Perhaps you should try some spelling variations:
"dang java java snippets" » "dang va java snippets"
"dung van tao slippers" » "duong van tao slippers", "dung va tao slippers", "dang van tao slippers", "dung van thao slippers", "dung vang tao slippers", "dung van tai slippers", "dung van tao slippery", "dung van tao 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 ("dung van tao slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang java java snippets") OR ("dung van tao slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang java java snippets ) or ( dung van tao slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang java java snippets") or ("dung van tao slippers"))) or ("locating bug code snippets"))*.