Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van quang cong snippets" » "van quang code snippets", "van quang cuong snippets", "van quang dong snippets", "van quang hoang snippets", "van quan cong snippets", "tran quang cong snippets", "van tuan cong 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 java java snippets") or ("van quang cong snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("van quang cong snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( van quang cong snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("van quang cong snippets"))) or ("locating bug core snippets"))*.