Perhaps you should try some spelling variations:
"cuon nhung cau snippets" » "cua nhung cau snippets", "cho nhung cau snippets", "chon chung cau snippets", "cuon chung cu snippets", "cuon nhung bai snippets", "cuon nhu cau 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: (((("cuon nhung cau snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cuon nhung cau snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cuon nhung cau snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuon nhung cau snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.