Perhaps you should try some spelling variations:
"dung quang khue snippets" » "dung quang code snippets", "dang quang khue snippets", "luong quang khue snippets", "dung luan khue snippets", "dung quang huy snippets", "dung quang khai snippets", "dung quan khu 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: (((("dung quang khue snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung quang khue snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung quang khue snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung quang khue snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.