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