Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc khien so snippets" » "hoc hien so snippets", "hoc nghien so snippets", "hoc thieu so snippets", "hoc khien mo snippets", "hoc khien hoc snippets", "hoc khien cho 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: (((("hoc khien so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc khien so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc khien so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc khien so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.