Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tuan ho snippets" » "van quan ho snippets", "van ban ho snippets", "anh tuan ho snippets", "van tuan pho snippets", "van toan ho snippets", "van xuan ho 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: (((("van tuan ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van tuan ho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tuan ho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tuan ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.