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