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