Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van kiem mo snippets" » "va kiem mo snippets", "van kien mo snippets", "van hieu mo snippets", "van kiem mon snippets", "van kiem mot snippets", "van niem moi 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 kiem mo 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 kiem mo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van kiem mo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van kiem mo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.