Perhaps you should try some spelling variations:
"phap toan de snippets" » "phap hoan de snippets", "phap luan de snippets", "tap toan de snippets", "phap toan du snippets", "phap toan ke snippets", "phap toan ve snippets"
"luong cac code snippets" » "luong cuoc code snippets", "luong va code snippets", "luong tai code snippets", "luong cac cong snippets", "luong cac co snippets", "luong cac che snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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: (((("phap toan de snippets") or ("luong cac code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phap toan de snippets") OR ("luong cac code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap toan de snippets ) or ( luong cac code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap toan de snippets") or ("luong cac code snippets"))) or ("locating bug code snippets"))*.