Perhaps you should try some spelling variations:
"nhan using data snippets" » "nhan sinh data snippets", "nhan ung data snippets", "nhan using java snippets", "nhan using sat snippets", "nhan missing data snippets", "nhan using data slippers"
"cong co code snippets" » "dong co code snippets", "cong cu code snippets", "cong so code snippets", "cong cfd code snippets", "cong co code slippers"
"locating bug code snippets" » "locating bug code slippers", "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 co code snippets") or ("nhan using data snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong co code snippets") OR ("nhan using data snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong co code snippets ) or ( nhan using data snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong co code snippets") or ("nhan using data snippets"))) or ("locating bug code snippets"))*.