Perhaps you should try some spelling variations:
"van ngoc hang slices" » "van ngoc ham slices", "van ngoc thang slices", "van ngoc hoang slices", "van ngoc hung slices", "tran ngoc hang slices", "van hoc hang slices", "van nghe hang slices"
"python using a snippets" » "python using a 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 a snippets") or ("van ngoc hang slices"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using a snippets") OR ("van ngoc hang slices"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using a snippets ) or ( van ngoc hang slices ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using a snippets") or ("van ngoc hang slices"))) or ("locating bug code snippets"))*.