Perhaps you should try some spelling variations:
"using data code snippets" » "using java code snippets", "using sat code snippets", "missing data code snippets", "using rate code snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung mo toan snippets" » "dung co toan snippets", "dung cho toan snippets", "dung von toan snippets", "dung mon toan snippets", "dung so toan snippets", "dung bao toan 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: (((("using data code snippets") or ("dung mo toan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using data code snippets") OR ("dung mo toan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using data code snippets ) or ( dung mo toan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using data code snippets") or ("dung mo toan snippets"))) or ("locating bug core snippets"))*.