Perhaps you should try some spelling variations:
"van viet trinh slippers" » "van viet trung slippers", "van viet thanh slippers", "van viet trong slippers", "san viet trinh slippers", "gian viet trinh slippers", "tran viet trinh slippers", "van viet trinh slippery", "van viet 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: (((("van viet trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van viet trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van viet trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van viet trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.