Perhaps you should try some spelling variations:
"da dieu java snippets" » "da dieu va snippets", "va dieu java snippets", "dang dieu java snippets", "doan dieu java snippets"
"dung dung cong snippets" » "duong dung cong snippets", "ung dung cong snippets", "dung ung cong snippets", "dung dung trong 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: (((("da dieu java snippets") or ("dung dung cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("da dieu java snippets") OR ("dung dung cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( da dieu java snippets ) or ( dung dung cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("da dieu java snippets") or ("dung dung cong snippets"))) or ("locating bug code snippets"))*.