Perhaps you should try some spelling variations:
"cong trinh java snippets" » "cong trinh java slippers"
"nang suat code snippets" » "nang suat code slippers", "nang xuat code snippets", "nang luat code snippets", "nang sua code snippets", "nang suat core snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bug core snippets", "locating bung code snippets", "locating bugs code 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 trinh java snippets") or ("nang suat code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong trinh java snippets") OR ("nang suat code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong trinh java snippets ) or ( nang suat code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong trinh java snippets") or ("nang suat code snippets"))) or ("locating bug code snippets"))*.