Perhaps you should try some spelling variations:
"van sinh trinh slippers" » "van dinh trinh slippers", "van hanh trinh slippers", "van sinh trung slippers", "van minh trinh slippers", "va sinh trinh slippers", "van sinh trinh slippery", "van sinh trinh grippers"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("van sinh trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van sinh trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van sinh trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van sinh trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.