Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"vong doi canh snippets" » "trong doi canh snippets", "huong doi canh snippets", "dung doi canh snippets", "vong doi hanh snippets", "vong boi canh snippets", "vong do canh 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: (((("vong doi canh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vong doi canh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vong doi canh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vong doi canh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.