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