Perhaps you should try some spelling variations:
"dung phan san slippers" » "dung nhan san slippers", "dung luan san slippers", "dung ha san slippers", "dung phan van slippers", "dung phan lan slippers", "dung pha san slippers", "dung phan san slippery", "dung phan san 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 phan san 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 phan san slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung phan san slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung phan san slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.