Perhaps you should try some spelling variations:
"manh nhung ca snippets" » "manh hung ca snippets", "anh nhung ca snippets", "canh nhung ca snippets", "manh nhung cau snippets", "manh nhung cam snippets", "manh nhung cay 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: (((("manh nhung ca snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("manh nhung ca snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( manh nhung ca snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("manh nhung ca snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.