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