Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van viec chi snippets" » "van viet chi snippets", "va viec chi snippets", "bang viec chi snippets", "van viec cho snippets", "van viec cuoi snippets", "van viec phai 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 viec chi 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 viec chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van viec chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van viec chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.