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