Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"do xuan ho snippets" » "vo xuan ho snippets", "ho xuan ho snippets", "do tuan ho snippets", "do xuan ha snippets", "do xuan huy snippets", "do xuan thu 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: (((("do xuan 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: (((("do xuan ho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( do xuan ho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("do xuan ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.