Perhaps you should try some spelling variations:
"van toan ham slippers" » "van toan ham slices", "van tuan ham slippers", "van tan ham slippers", "van thanh ham slippers", "van toan nham slippers", "van toan dam slippers", "van toan bam slippers"
"python using java snippets" » "python using data 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: (((("python using java snippets") or ("van toan ham slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("van toan ham slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( van toan ham slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("van toan ham slippers"))) or ("locating bug code snippets"))*.