Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
su viet » so viet
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va, hieu van
ban bo » can bo, ban do, ban co
ve ban » te ban, va ban, ve bao
bo van » vo van, so van, do van
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ly nang x hoi. hieu ve ban bo van hanh vi ((((cua triet) or (va triet))) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang x hoi. hieu ve ban bo van hanh vi ((((cua triet) OR (va triet))) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: su sach ly nang x hoi. hieu ve ban bo van hanh vi ((((cua triet) or (va triet))) or (su viet))*.