Perhaps you should try some spelling variations:
"hong van trinh slippers" » "hong van thinh slippers", "hong van tinh slippers", "hong dan trinh slippers", "hoang van trinh slippers", "thong van trinh slippers", "song van trinh slippers", "hong van trinh slippery", "hong van 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: (((("hong van 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: (((("hong van trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hong van trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hong van trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.