Perhaps you should try some spelling variations:
"dung hanh san slippers" » "dung thanh san slippers", "dang hanh san slippers", "dung danh san slippers", "dung khach san slippers", "dung thanh son slippers", "dung hanh san slippery", "dung hanh 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 hanh 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 hanh san slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung hanh san slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hanh san slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.