Perhaps you should try some spelling variations:
"luong thuc chat snippets" » "luong thuc code snippets", "thuong thuc chat snippets", "phuong thuc chat snippets", "luong thi chat snippets", "luong thuc chan snippets", "luong thuc pham snippets", "luong thuc vat 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 thuc 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 thuc chat snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( luong thuc chat snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong thuc chat snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.