Perhaps you should try some spelling variations:
"dung tranh cua snippets" » "dung thanh cua snippets", "dong tranh cua snippets", "dung trong cua snippets", "dung doanh cua snippets", "dung manh cua 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: (((("dung tranh cua snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tranh cua snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tranh cua snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tranh cua snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.