Perhaps you should try some spelling variations:
"yang cong cau snippets" » "dang cong cau snippets", "hang cong cau snippets", "bang cong cau snippets", "yang cong cu snippets", "yang cong chuc snippets", "yang thong 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: (((("yang cong 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: (((("yang cong cau snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( yang cong cau snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("yang cong cau snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.