Perhaps you should try some spelling variations:
"can tranh chao snippets" » "can tranh code snippets", "can tranh chap snippets", "can trinh chao snippets", "can tranh cua snippets", "canh tranh chao snippets", "tan tran chao snippets", "van ranh chao 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: (((("can tranh chao snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("can tranh chao snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( can tranh chao snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("can tranh chao snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.