Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chon van hoe snippets" » "chon va hoe snippets", "thong van hoe snippets", "phong van hoe snippets", "chon van hoa snippets", "chon van hoc snippets", "chon van hieu 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: (((("chon van hoe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chon van hoe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chon van hoe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chon van hoe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.