Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dong cac cham snippets" » "duong cac cham snippets", "dong bac cham snippets", "dung cac cham snippets", "dong cac chat snippets", "dong ca cham snippets", "dong cac cam 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 java java snippets") or ("dong cac cham snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dong cac cham snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dong cac cham snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dong cac cham snippets"))) or ("locating bug code snippets"))*.