Perhaps you should try some spelling variations:
doanh thai » doanh tai, doanh thanh, doanh nhan
gia doanh » gia thanh, gia dinh, giai doan
cua viet » ca viet, hoa viet, cua vat
thai cua » than cua, tai cuc, tri cua
hieu van » hieu va, thien van, lieu va
duc gia » quoc gia
cau duc » cao duc, cau luc, chu duc
van cau » van dau, van hau, van chat
tu cach » tu cac
so sach » so sanh, bo sach, co sach
su sach » vu sach
ly ang » ly hang, ly vang, ly nang
ang xa » lang xa, mang xa, dang xay

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (((su sach) OR (so sach)))) ly ang xa hoi. hieu van cau duc gia doanh thai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (((su sach) OR (so sach)))) ly ang xa hoi. hieu van cau duc gia doanh thai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (((su sach) OR (so sach)))) ly ang xa hoi. hieu van cau duc gia doanh thai cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (((su sach) OR (so sach)))) ly ang xa hoi. hieu van cau duc gia doanh thai cua viet*.