Perhaps you should try some spelling variations:
"cong hieu data snippets" » "dong hieu data snippets", "cong dieu data snippets", "long hieu data snippets", "cong lieu data snippets", "cong bieu dat snippets", "cong hieu bat snippets", "cong hieu data slippers"
"hang java java snippets" » "hang va java snippets", "hang 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 hieu data snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong hieu data snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong hieu data snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong hieu data snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.