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