Perhaps you should try some spelling variations:
"vi trung code snippets" » "vi trung co snippets", "va trung code snippets", "viet trung code snippets", "vien trung code snippets"
"using java java slippery" » "using data java slippery"
"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.

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