Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tac danh hoi snippets" » "tac danh code snippets", "sach danh hoi snippets", "cac doanh hoi snippets", "cac dan hoi snippets", "tac danh hoa snippets", "tac dan hoi snippets", "tac danh hoc snippets"
"python using java snippets" » "python using data 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: (((("tac danh hoi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tac danh hoi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tac danh hoi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tac danh hoi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.