Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve bac » ve bao, ve cac, ve ban
bac so » bac son, bac si, bac bo
so van » su van, vo van

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang xa hoi. hieu ve bac so van hanh vi ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. hieu ve bac so van hanh vi ((cua triet) OR (su triet))*.