Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"trieu ve cac snippets" » "thieu ve cac snippets", "trieu le cac snippets", "trieu vi cac snippets", "trieu va cac snippets", "trieu vien cac 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: (((("trieu ve cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trieu ve cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trieu ve cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trieu ve cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.