Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong thanh can snippets" » "cong thanh code snippets", "dong thanh can snippets", "cong trinh can snippets", "cong tan can snippets", "cong thanh san snippets", "cong thanh van snippets", "cong thanh tan 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 thanh 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 thanh can snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong thanh can snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong thanh can snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.