Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"trong toan co snippets" » "trong toan code snippets", "truong toan co snippets", "trong tan co snippets", "trong hoan co snippets", "trong toan cao snippets", "trong toan ho snippets", "trong toan hoc snippets"
"dung java java snippets" » "dung 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: (((("trong toan co snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trong toan co snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( trong toan co snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trong toan co snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.