Perhaps you should try some spelling variations:
"khang minh cach snippets" » "khang sinh cach snippets", "khong minh cach snippets", "khang ninh cach snippets", "khang tinh cach snippets", "khang minh cac snippets", "khang minh chanh 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: (((("khang minh cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khang minh cach snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khang minh cach snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khang minh cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.