Perhaps you should try some spelling variations:
"hang doi cong snippets" » "hang doi code snippets", "hang di cong snippets", "hang loi cong snippets", "huong doi cong snippets", "hang doi song snippets", "hang noi cong snippets", "hang moi cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung 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: (((("hang doi cong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hang doi cong snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( hang doi cong snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang doi cong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.