Perhaps you should try some spelling variations:
"dung pham anh slippers" » "dung phan anh slippers", "hung pham anh slippers", "tung pham anh slippers", "dung pham thanh slippers", "dung pham minh slippers", "dung pham van slippers", "dung pham anh slippery", "dung pham anh grippers"
"dung java java snippets" » "dung va java 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: (((("dung pham anh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung pham anh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung pham anh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung pham anh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.