Perhaps you should try some spelling variations:
"dun lang chai snippets" » "dun lang ha snippets", "dun lang cua snippets", "dun lang phi snippets", "dun nang chai snippets", "den lang chai snippets", "dua lang chai 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: (((("dun lang chai snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dun lang chai snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dun lang chai snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dun lang chai snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.