Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ham hoc voi snippets" » "am hoc voi snippets", "tam hoc voi snippets", "thai hoc voi snippets", "ham hoc vi snippets", "ham hoc vo snippets", "ham hoc noi 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: (((("ham hoc 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: (((("ham hoc voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ham hoc voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ham hoc voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.