Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets"
"dung cac chan snippets" » "luong cac chan snippets", "dung cho chan snippets", "dung tai chan snippets", "dung cam chan snippets", "dung cac nhan snippets", "dung cac chat 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 cac chan 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 cac chan snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cac chan snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cac chan snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.