Perhaps you should try some spelling variations:
"phan tap cong snippets" » "phan tap code snippets", "phan lap cong snippets", "han tap cong snippets", "phan tu cong snippets", "phan tmcp cong snippets", "phan cac cong snippets", "phan tap co 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: (((("phan tap 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: (((("phan tap cong snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( phan tap cong snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan tap cong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.