Perhaps you should try some spelling variations:
"dau quang trinh slippers" » "dau quang thinh slippers", "dau quang ninh slippers", "dau quang binh slippers", "dat quang trinh slippers", "dang quang trinh slippers", "doan quang trinh slippers", "dau quang trinh slippery", "dau quang trinh 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 java java snippets") or ("dau quang trinh slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dau quang trinh slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dau quang trinh slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dau quang trinh slippers"))) or ("locating bug code snippets"))*.