Perhaps you should try some spelling variations:
"anh tranh doc snippets" » "canh tranh doc snippets", "lanh tranh doc snippets", "anh thanh doc snippets", "anh tranh duoc snippets", "anh trinh doc snippets", "anh 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: (((("anh 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: (((("anh tranh doc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( anh tranh doc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("anh tranh doc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.