Perhaps you should try some spelling variations:
"van hanh pham slices" » "van hanh ham slices", "van thanh pham slices", "van khanh pham slices", "van hang pham slices", "ban hanh pham slices", "van anh pham slices"
"python using raw snippets" » "python using real snippets", "python using a snippets", "python using low snippets", "python using raw 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 raw snippets") or ("van hanh pham slices"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using raw snippets") OR ("van hanh pham slices"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using raw snippets ) or ( van hanh pham slices ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using raw snippets") or ("van hanh pham slices"))) or ("locating bug code snippets"))*.