Perhaps you should try some spelling variations:
"quoc hung trinh slippers" » "quoc hung thinh slippers", "quoc hung tinh slippers", "quoc chuong trinh slippers", "duc hung trinh slippers", "quoc hung trinh slippery", "quoc hung 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 ("quoc hung 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 ("quoc hung trinh slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( quoc hung trinh slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("quoc hung trinh slippers"))) or ("locating bug code snippets"))*.