Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong vinh cac snippets" » "cong vinh code snippets", "cong trinh cac snippets", "trong vinh cac snippets", "cong viec cac snippets", "cong dinh cac snippets", "cong minh cac snippets", "cong tinh cach 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 vinh cac 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 vinh cac snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong vinh cac snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong vinh cac snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.