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