Perhaps you should try some spelling variations:
"doc chat chong snippets" » "doc chat phong snippets", "doc chat luong snippets", "doc chat long snippets", "hoc chat chong snippets", "toc cham chong snippets", "hop chat chong 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: (((("doc chat chong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc chat chong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc chat chong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc chat chong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.