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