Perhaps you should try some spelling variations:
"dung trong cham snippets" » "dung trong code snippets", "dung trang cham snippets", "dung trong cac snippets", "dung trong nha snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung ngu java snippets" » "dung nga java snippets", "dung ngo java snippets", "dung nguoi java snippets", "dung ngu va 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 ngu java snippets") or ("dung trong cham snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung ngu java snippets") OR ("dung trong cham snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung ngu java snippets ) or ( dung trong cham snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung ngu java snippets") or ("dung trong cham snippets"))) or ("locating bug core snippets"))*.