Perhaps you should try some spelling variations:
"luong java java snippets" » "luong va java snippets"
"cong bang code snippets" » "cuong bang code snippets", "dong bang code snippets", "hong bang code snippets", "cong bang cong snippets", "cong bang che snippets", "cong bang cot snippets"
"locating bug core snippets" » "locating bug 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: (((("luong java java snippets") or ("cong bang code snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luong java java snippets") OR ("cong bang code snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( luong java java snippets ) or ( cong bang code snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong java java snippets") or ("cong bang code snippets"))) or ("locating bug core snippets"))*.