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