Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"using rate code snippets" » "using waste code snippets", "using data code snippets", "using raw code snippets", "using rate code slippers"
"dung dat viet snippets" » "dung va viet snippets", "dung tai viet snippets", "dung dao viet snippets", "dung da viet snippets", "dung dai viet snippets", "dung dat viet slippers"

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 ("dung dat viet snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using rate code snippets") OR ("dung dat viet snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( using rate code snippets ) or ( dung dat viet snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using rate code snippets") or ("dung dat viet snippets"))) or ("locating bugs code snippets"))*.