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 java java snippets" » "using data java snippets"
"locating bug code slippers" » "locating bung code slippers", "locating bugs code slippers"

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

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