Perhaps you should try some spelling variations:
"trong dan cach snippets" » "trong dan code snippets", "trong dang cach snippets", "trong san cach snippets", "trong tan cach snippets", "trong dan cac snippets", "trong dan canh snippets", "trong nhan cach snippets"
"locating bug core snippets" » "locating bug code 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 dan cach 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 dan cach snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( trong dan cach snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trong dan cach snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.