Perhaps you should try some spelling variations:
"hoc sach ky thuat ung dung trong marketing" » "hoc sach ky thuat ung dung tri marketing", "hoc sach ky thuat ung dung tvqg marketing", "hoc sach ky thuat dung dung trong marketing", "hoc sach ky thuat hung dung trong marketing", "hoc sach ky thuat song dung trong marketing", "hoc sinh ky thuat ung dung trong marketing", "hoc anh ky thuat ung dung trong marketing", "hoc sac ky thuat ung dung trong marketing", "hoc sach y thuat ung dung trong marketing", "hoc sach ty thuat ung dung trong marketing"
"hoc cac ki thuat xung dung trong marketing" » "hoc cac ki thuat xung dung tri marketing", "hoc cac ki thuat xung dung tvqg marketing", "hoc cac ki thuat dung dung trong marketing", "hoc cac ki thuat hung dung trong marketing", "hoc cac ki thuat song dung trong marketing", "hoc cac ki thuat cung dung trong marketing", "hoc cac ki thuat cuong dung trong marketing", "hoc cao ki thuat xung dung trong marketing", "hoc cac khi thuat xung dung trong marketing", "hoc cac ky thuat xung dung trong marketing", "hoc cac vi thuat xung dung trong 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 sach ky thuat ung dung trong marketing") or ("hoc cac ki thuat xung dung trong marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("hoc sach ky thuat ung dung trong marketing") OR ("hoc cac ki thuat xung dung trong marketing")).
• Removing quotes may allow a broader search: (( hoc sach ky thuat ung dung trong marketing ) or ( hoc cac ki thuat xung dung trong marketing )).
• Adding a wildcard symbol may retrieve word variants: (("hoc sach ky thuat ung dung trong marketing") or ("hoc cac ki thuat xung dung trong marketing"))*.