Perhaps you should try some spelling variations:
"van trinh thuc slippers" » "van trinh tu slippers", "van trinh thi slippers", "van thinh thuc slippers", "van tinh thuc slippers", "dan trinh thuc slippers", "van trinh thuc slippery", "van trinh thuc grippers"
"using java java snippets" » "using data java snippets"
"locating bug code snippets" » "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: (((("van trinh thuc slippers") or ("using java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van trinh thuc slippers") OR ("using java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van trinh thuc slippers ) or ( using java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van trinh thuc slippers") or ("using java java snippets"))) or ("locating bug code snippets"))*.