Perhaps you should try some spelling variations:
"lan trinh chao snippets" » "lan trinh chat snippets", "lan trinh han snippets", "lan trinh co snippets", "lap trinh chao snippets", "dan trinh chao snippets", "lan tranh chao 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: (((("lan trinh chao snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lan trinh chao snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan trinh chao snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan trinh chao snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.