Perhaps you should try some spelling variations:
"truan doi cham snippets" » "truan doi code snippets", "truyen doi cham snippets", "quan doi cham snippets", "khuan doi cham snippets", "truan hoi cham snippets", "truan goi cham snippets", "truan toc 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: (((("truan doi 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: (((("truan doi cham snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( truan doi cham snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("truan doi cham snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.