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