Perhaps you should try some spelling variations:
"van thinh java snippets" » "van trinh java snippets", "van think java snippets", "van thanh java snippets", "van chinh java snippets", "van minh java snippets"
"luong cac co snippets" » "luong cuoc co snippets", "luong va co snippets", "luong tai co snippets", "luong cac cong 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 cac co snippets") or ("van thinh java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luong cac co snippets") OR ("van thinh java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luong cac co snippets ) or ( van thinh java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong cac co snippets") or ("van thinh java snippets"))) or ("locating bug code snippets"))*.