Perhaps you should try some spelling variations:
"cong lang thi snippets" » "cong vang thi snippets", "cong luong thi snippets", "cong quang thi snippets", "cong lang thai snippets", "cong dang thi snippets", "cong tang thi snippets", "cong lang thi slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 lang thi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong lang thi snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong lang thi snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong lang thi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.