Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tac vang que snippets" » "cac van que snippets", "tac dung que snippets", "tac dong que snippets", "tac lang que snippets", "tac van que snippets", "tac lang quen 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: (((("tac vang que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tac vang que snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tac vang que snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tac vang que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.