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