Perhaps you should try some spelling variations:
"dung tao dong snippets" » "dung tao code snippets", "dung tai dong snippets", "dung bao dong snippets", "dung tay dong snippets", "dung lao dong snippets", "dung dao dong snippets", "dung cao dong 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: (((("dung tao dong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tao dong snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung tao dong snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tao dong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.