Perhaps you should try some spelling variations:
"jong chon cac snippets" » "jong chan cac snippets", "jong ching cac snippets", "dong cho cac snippets", "jong cho cac snippets", "jong thong cac snippets", "jong hoc cac 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: (((("jong chon cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("jong chon cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( jong chon cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("jong chon cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.