Perhaps you should try some spelling variations:
"hoang toan cau snippets" » "hoang thoan cau snippets", "hoang tran cau snippets", "hoang tuan cau snippets", "hoang toan cao snippets", "hoang toan ban snippets", "hoang toan tap 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 ("hoang toan cau snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a code snippets") OR ("hoang toan cau snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using a code snippets ) or ( hoang toan cau snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using a code snippets") or ("hoang toan cau snippets"))) or ("locating bug code snippets"))*.