Perhaps you should try some spelling variations:
"hang thuong co snippets" » "hang thuong con snippets", "hang thong co snippets", "hang thuong ho snippets", "nang thuong co snippets", "dang thuong co snippets", "hanh thuong co 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: (((("hang thuong co snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hang thuong co snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang thuong co snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang thuong co snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.