Perhaps you should try some spelling variations:
"duoc cac cach snippets" » "duoc cac code snippets", "cuoc cach cach snippets", "duoc chat cach snippets", "duong cac cach snippets", "duoc cai cach snippets", "duoc cuoc cach snippets", "duoc va cach 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: (((("duoc cac cach snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duoc cac cach snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( duoc cac cach snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoc cac cach snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.