Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
dang xay » dang van, van xay
viec cac » vien cac, viec cua, viec lam
su triet » su tien, ve triet
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
su viet » so viet
cac tu » cac thu, cach tu, cac du

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky dang xay hoi. hieu viec cac tu va hanh va ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky dang xay hoi. hieu viec cac tu va hanh va ((su triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xay hoi. hieu viec cac tu va hanh va ((su triet) or (su viet))*.