Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"van anh doc snippets" » "van thanh doc snippets", "van minh doc snippets", "tuan anh doc snippets", "van anh duc snippets", "van anh hoc snippets", "van nang doc 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: (((("van anh 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: (((("van anh doc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van anh doc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van anh doc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.