Perhaps you should try some spelling variations:
qua nhan » cua nhan, qua nhat, qua phan
nhan duc » nhan duoc, nhan luc, phan duc
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
su triet » su viet, su tien, ve triet
thu sac » thu sach, thu san, thu xac
duc van » duc va, duc tan, duc manh
sac ky » cac ky, sai ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky nang x ho. hieu qua nhan duc van hanh vi ((va triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang x ho. hieu qua nhan duc van hanh vi ((va triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang x ho. hieu qua nhan duc van hanh vi ((va triet) or (su triet))*.