Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tin cham snippets" » "van tinh cham snippets", "van trinh cham snippets", "van tinh chat snippets", "van tien cham snippets", "van tan cham snippets", "van thinh cham 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 tin cham 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 tin cham snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tin cham snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tin cham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.