Perhaps you should try some spelling variations:
"he truong va snippets" » "he trung va snippets", "de truong va snippets", "he trong va snippets", "he truong dai snippets", "he truong cao snippets", "he truong dao snippets", "he truong va slippers"
"using _ java snippets" » "using _ java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

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