Perhaps you should try some spelling variations:
"trong su cham snippets" » "trong su code snippets", "trong san cham snippets", "trong thu cham snippets", "trong qua cham snippets", "trong su pham snippets", "trong tu cham snippets", "trong vu cham 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 su cham 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 su cham snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( trong su cham snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trong su cham snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.