Perhaps you should try some spelling variations:
"van ngoc trinh slippers" » "van ngoai trinh slippers", "van ngoc thanh slippers", "van ngoc minh slippers", "tran ngoc trinh slippers", "van hoc trinh slippers", "van nghe trinh slippers", "van ngoc trinh slippery", "van ngoc 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"

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 ("van ngoc 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 ("van ngoc trinh slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( van ngoc trinh slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("van ngoc trinh slippers"))) or ("locating bug code snippets"))*.