Perhaps you should try some spelling variations:
"dia trinh van snippets" » "giao trinh van snippets", "dinh trinh van snippets", "qua trinh van snippets", "dia trinh han snippets", "dia trinh quan snippets", "dia trinh toan snippets", "dia trinh van 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: (((("dia trinh van snippets") or ("using low java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dia trinh van snippets") OR ("using low java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dia trinh van snippets ) or ( using low java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dia trinh van snippets") or ("using low java snippets"))) or ("locating bug code snippets"))*.