Perhaps you should try some spelling variations:
"dung minh thi slippers" » "duong minh thi slippers", "dung ninh thi slippers", "dung vinh thi slippers", "dung dinh thi slippers", "dung minh tri slippers", "dung minh chi slippers", "dung minh thi slippery", "dung minh thi 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 minh thi 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 minh thi slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung minh thi slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung minh thi slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.