Perhaps you should try some spelling variations:
"phong ban toc snippets" » "phong van toc snippets", "hong ban toc snippets", "phuong bang toc snippets", "phong dan toc snippets", "phong ban toi snippets", "phong ban thuoc snippets"
"dung java java snippets" » "dung va java 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: (((("phong ban toc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phong ban toc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phong ban toc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phong ban toc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.