Perhaps you should try some spelling variations:
"pham hoc trinh slippers" » "pham doc trinh slippers", "pham hoc tinh slippers", "pham hoc sinh slippers", "phap hoc trinh slippers", "phau hoc trinh slippers", "pham hoa trinh slippers", "pham hoc trinh slippery", "pham hoc 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: (((("pham hoc 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: (((("pham hoc trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham hoc trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham hoc trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.