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