Perhaps you should try some spelling variations:
"gian hoc chat snippets" » "gian hoc code snippets", "gian hoi chat snippets", "gian hoa chat snippets", "gian doc chat snippets", "gian hoc phat snippets", "gian hoc cao snippets", "gian hoc phan 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 java java snippets") or ("gian hoc chat snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("gian hoc chat snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( gian hoc chat snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("gian hoc chat snippets"))) or ("locating bug core snippets"))*.