Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
truc van » truc va, thuc van, truc ban
dau truc » cau truc, dai truc, doan truc
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
hanh va » hang va, hanh vi
va dau » va dao
sai ky » sac ky
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: tu ((sach ty) or (sai ky)) nang x hoi. hieu va dau truc van hanh va ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sai ky)) nang x hoi. hieu va dau truc van hanh va ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sai ky)) nang x hoi. hieu va dau truc van hanh va ((cua triet) or (su triet))*.