Perhaps you should try some spelling variations:
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"hoc sach ky thuat ung dung tvqg marketing" » "hoc sach ky thuat ung dung tri marketing", "hoc sach ky thuat dung dung tvqg marketing", "hoc sach ky thuat xung dung tvqg marketing", "hoc sach ky thuat song dung tvqg marketing", "hoc sach ky thuat ung dung tong marketing", "hoc cac ky thuat ung dung tvqg marketing", "hoc anh ky thuat ung dung tvqg marketing", "hoc sac ky thuat ung dung tvqg marketing", "hoc sach y thuat ung dung tvqg marketing", "hoc sach ty thuat ung dung tvqg marketing"

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: (("hoc sinh my thuat hung dung trong marketing") or ("hoc sach ky thuat ung dung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("hoc sinh my thuat hung dung trong marketing") OR ("hoc sach ky thuat ung dung tvqg marketing")).
• Removing quotes may allow a broader search: (( hoc sinh my thuat hung dung trong marketing ) or ( hoc sach ky thuat ung dung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("hoc sinh my thuat hung dung trong marketing") or ("hoc sach ky thuat ung dung tvqg marketing"))*.