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