Perhaps you should try some spelling variations:
"hong tham cach snippets" » "chong tham cach snippets", "hong thai cach snippets", "hoang thai cach snippets", "hong tham canh snippets", "hong nhan cach snippets", "hong pham sach 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: (((("hong tham cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hong tham cach snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hong tham cach snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hong tham cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.