Perhaps you should try some spelling variations:
"chinh tri trinh slippers" » "chinh tra trinh slippers", "chinh thi trinh slippers", "chinh tri tinh slippers", "chinh tri trinh slippery", "chinh tri 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: (((("chinh tri 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: (((("chinh tri trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chinh tri trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chinh tri trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.