Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van kinh mon snippets" » "va kinh mon snippets", "van minh mon snippets", "van dinh mon snippets", "van dinh moi snippets", "van kinh hoc snippets", "van kinh co 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 kinh mon 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 kinh mon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van kinh mon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van kinh mon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.