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