Perhaps you should try some spelling variations:
"vi trung son grippers" » "vi trung soft grippers", "vi truong son grippers", "vi trung uong grippers", "vi trung hoc grippers", "va trung son grippers", "viet trung son grippers", "vien trung son grippers"
"using java java snippets" » "using data java snippets", "using java 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using java java snippets\") OR (\"vi trung son grippers\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using java java snippets ) OR ( vi trung son grippers ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java java snippets") OR ("vi trung son grippers"))) OR ("locating bug code snippets"))*.