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