Perhaps you should try some spelling variations:
"vi truong code snippets" » "vi truong cd snippets", "vi truong co snippets", "vi truong cong snippets", "vi trung code snippets", "va truong code snippets", "vu truong code snippets"
"using raw java snippets" » "using real java snippets", "using a java snippets", "using low java snippets"
"locating bug core snippets" » "locating bug code snippets"

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

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