Perhaps you should try some spelling variations:
"luong tu chat snippets" » "luong tu code snippets", "luong tai chat snippets", "luong thi chat snippets", "luong tin chat snippets", "luong tu phat snippets", "luong tu cham snippets", "luong du 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: (((("luong tu 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: (((("luong tu chat snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( luong tu chat snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong tu chat snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.