Perhaps you should try some spelling variations:
"dung thoi doai snippets" » "dung thoi dai snippets", "dung hoi doai snippets", "dung thai doan snippets", "dung thi doai snippets", "dung toi doai snippets", "dung thuoc doai snippets"
"using a code snippets" » "using a core 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 a code snippets") or ("dung thoi doai snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a code snippets") OR ("dung thoi doai snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using a code snippets ) or ( dung thoi doai snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using a code snippets") or ("dung thoi doai snippets"))) or ("locating bug code snippets"))*.