Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong tich can snippets" » "cong tich code snippets", "cong tinh can snippets", "cong lich can snippets", "cong trinh can snippets", "cong tich cac snippets", "cong tich van snippets", "cong dich can 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: (((("cong tich can snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong tich can snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong tich can snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong tich can snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.