Perhaps you should try some spelling variations:
"cao ngoc cham snippets" » "cao ngoc chau snippets", "cao nguoi cham snippets", "cao toc cham snippets", "van ngoc cham snippets", "ma ngoc cham snippets", "mai ngoc 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: (((("cao ngoc 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: (((("cao ngoc cham snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao ngoc cham snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao ngoc cham snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.