Perhaps you should try some spelling variations:
"luong chat vo snippets" » "luong cac vo snippets", "luong cua vo snippets", "luong ha vo snippets", "luong chat va snippets", "luong chat co snippets", "luong chat bo snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 chat vo snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luong chat vo snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luong chat vo snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong chat vo snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.