Perhaps you should try some spelling variations:
"dung mot chat snippets" » "dung mot code snippets", "dung mo chat snippets", "dung co chat snippets", "dung dat chat snippets", "dung mot chut snippets", "dung hoat chat snippets", "dung soat chat snippets"
"locating bug core snippets" » "locating bug code snippets"
"hang java java snippets" » "hang 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 mot chat snippets") or ("hang java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung mot chat snippets") OR ("hang java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung mot chat snippets ) or ( hang java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung mot chat snippets") or ("hang java java snippets"))) or ("locating bug core snippets"))*.