Perhaps you should try some spelling variations:
"van luong code snippets" » "van luong cong snippets", "van luong che snippets", "van duong code snippets", "van cuong code snippets", "nang luong code snippets"
"locating bug core snippets" » "locating bug code snippets"
"using a va snippets" » "using ca va snippets", "using ra va snippets", "using a van snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using a va snippets") or ("van luong code snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a va snippets") OR ("van luong code snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using a va snippets ) or ( van luong code snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using a va snippets") or ("van luong code snippets"))) or ("locating bug core snippets"))*.