Perhaps you should try some spelling variations:
"using java can snippets" » "using data can snippets"
"cong luong cong snippets" » "cong thuong cong snippets", "nang luong cong snippets", "cong dong cong snippets", "cong dung cong snippets", "cong trong cong snippets", "cong cong cong snippets"
"locating bug code snippets" » "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: (((("using java can snippets") or ("cong luong cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java can snippets") OR ("cong luong cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java can snippets ) or ( cong luong cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java can snippets") or ("cong luong cong snippets"))) or ("locating bug code snippets"))*.