Perhaps you should try some spelling variations:
"hanh thuoc cac snippets" » "thanh phuoc cac snippets", "hanh phuc cac snippets", "dang thuoc cac snippets", "hanh thuoc cuc snippets", "hanh thuoc cao snippets", "hanh thuoc dac snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("hanh thuoc cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh thuoc cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh thuoc cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh thuoc cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.