Perhaps you should try some spelling variations:
"dung sai chat snippets" » "dung sai code snippets", "dung tai chat snippets", "dung va chat snippets", "dung dat chat snippets", "dung sat chat snippets", "dung soat chat snippets", "dung suat 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: (((("dung sai chat 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 sai chat snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung sai chat snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung sai chat snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.