Perhaps you should try some spelling variations:
"nang luoc can snippets" » "nang luc can snippets", "nang luong can snippets", "nang doc can snippets", "nang luc canh snippets", "nang hoc can snippets", "nang luoc dai 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: (((("nang luoc can snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nang luoc can snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nang luoc can snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nang luoc can snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.