Perhaps you should try some spelling variations:
"hoang hanh cac snippets" » "hoang thanh cac snippets", "hoang anh cac snippets", "hoang xanh cac snippets", "hoang hang cac snippets", "hoang hanh cat snippets", "hoang nhanh cay 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: (((("hoang hanh 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: (((("hoang hanh cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoang hanh cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoang hanh cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.