Perhaps you should try some spelling variations:
"tung dan chan snippets" » "tung dan code snippets", "dung dan chan snippets", "huong dan chan snippets", "trung dai chan snippets", "tung dan gian snippets", "tung dan ca snippets", "tung van chat 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: (((("tung dan chan snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tung dan chan snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tung dan chan snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tung dan chan snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.