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