Perhaps you should try some spelling variations:
"khanh dinh doat snippets" » "khanh linh doat snippets", "khanh vinh doat snippets", "hanh dinh doat snippets", "khanh dinh dat snippets", "khanh dinh hoat snippets", "khanh dinh chat snippets"
"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 dinh doat 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 dinh doat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khanh dinh doat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khanh dinh doat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.