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