Perhaps you should try some spelling variations:
"co cac ky thuat ung dung trong marketing" » "co cac ky thuat ung dung tvqg marketing", "co cac ky thuat dung dung trong marketing", "co cac ky thuat xung dung trong marketing", "co cac ky thuat song dung trong marketing", "cho cac ky thuat ung dung trong marketing", "ca cac ky thuat ung dung trong marketing", "co cau ky thuat ung dung trong marketing"
"bo sach kem thuat hung dung tri marketing" » "bo sach kem thuat hung dung tvqg marketing", "bo sach kem thuat hung dung _ marketing", "bo sach kem thuat hung dung cuu marketing", "bo sach kem thuat dung dung tri marketing", "bo sach kem thuat xung dung tri marketing", "bo sach kem thuat chuong dung tri marketing", "bo sach kiem thuat hung dung tri marketing", "bo sach ki thuat hung dung tri marketing", "bo sach ve thuat hung dung tri marketing", "bo sach kem thuat nhung dung tri marketing", "bo sach kem thuat phung dung tri marketing", "bo hanh kem thuat hung dung tri marketing", "bo sach kem thuat hung dung tai marketing", "bo sach kem thuat hung dung tren marketing", "bo sach kem thuat hung dung sai marketing", "co sach kem thuat hung dung tri marketing", "hoc sach kem thuat hung dung tri 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: (("co cac ky thuat ung dung trong marketing") or ("bo sach kem thuat hung dung tri marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("co cac ky thuat ung dung trong marketing") OR ("bo sach kem thuat hung dung tri marketing")).
• Removing quotes may allow a broader search: (( co cac ky thuat ung dung trong marketing ) or ( bo sach kem thuat hung dung tri marketing )).
• Adding a wildcard symbol may retrieve word variants: (("co cac ky thuat ung dung trong marketing") or ("bo sach kem thuat hung dung tri marketing"))*.