Perhaps you should try some spelling variations:
"using rate code snippets" » "using waste code snippets", "using data code snippets", "using raw code snippets", "using rate core snippets"
"dong dung cac snippets" » "dong duong cac snippets", "duong dung cac snippets", "cong dung cac snippets", "dong luong cac snippets", "dong dung cho snippets", "dong dung tai snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code 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 rate code snippets") or ("dong dung cac snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using rate code snippets") OR ("dong dung cac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using rate code snippets ) or ( dong dung cac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using rate code snippets") or ("dong dung cac snippets"))) or ("locating bug code snippets"))*.