Perhaps you should try some spelling variations:
"dung thi cham snippets" » "dung thi code snippets", "dung tai cham snippets", "dung tri cham snippets", "dung chi cham snippets", "dung thi hai snippets", "dung toc cham snippets", "dung thi ha snippets"
"locating bug core snippets" » "locating bug code snippets"
"luong java java snippets" » "luong va java 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: (((("luong java java snippets") or ("dung thi cham snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luong java java snippets") OR ("dung thi cham snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( luong java java snippets ) or ( dung thi cham snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong java java snippets") or ("dung thi cham snippets"))) or ("locating bug core snippets"))*.