Perhaps you should try some spelling variations:
"tinh toan cham snippets" » "tinh toan chay snippets", "tinh toan ham snippets", "tinh toan nham snippets", "trinh toan cham snippets", "dinh toan cham snippets", "minh toan cham snippets"
"dung java java snippets" » "dung va java 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: (((("tinh toan cham snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tinh toan cham snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tinh toan cham snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tinh toan cham snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.