Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cay thuoc » cua thuoc, nam thuoc, va thuoc
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
thuoc ma » hoc ma, duoc ma
ma doanh » va doanh, hoa doanh, van doanh
ky lang » ky dang, ky tang, tay lang
van cay » van cau, van bay, van ca
van cua » vang cua, ban cua, dan cua
te cac » ve cac, te cao, de cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te cac) or (tu cac)) ((ky lang) OR (ky nang)) xa hoi. hieu van cay thuoc ma doanh van cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (tu cac)) ((ky lang) OR (ky nang)) xa hoi. hieu van cay thuoc ma doanh van cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cac) or (tu cac)) ((ky lang) OR (ky nang)) xa hoi. hieu van cay thuoc ma doanh van cua triet".
• Adding a wildcard symbol may retrieve word variants: ((te cac) or (tu cac)) ((ky lang) OR (ky nang)) xa hoi. hieu van cay thuoc ma doanh van cua triet*.