Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets"
"van hoan o2 snippets" » "van hoang o2 snippets", "van hoa o2 snippets", "van toan o2 snippets", "van hoan doi 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 data snippets") or ("van hoan o2 snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using data snippets") OR ("van hoan o2 snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( python using data snippets ) or ( van hoan o2 snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using data snippets") or ("van hoan o2 snippets"))) or ("locating bugs code snippets"))*.