Perhaps you should try some spelling variations:
doanh cao » doanh co, doanh bao, doanh cho
cua viet » ca viet, hoa viet, cua vat
danh dao » doanh dao, lanh dao, danh dau
thuc va » thuc vat, thuc dan, thuc day
tu sac » tu sach, tu cac, tu san
nang o » nang co, nang ho, nang ro
sac ky » cac ky, sai ky
o hoi » co hoi, o hoc, o hai
va am » va lam, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang o hoi. hieu ((ve am) OR (va am)) thuc va ((danh dao) or (doanh cao)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang o hoi. hieu ((ve am) OR (va am)) thuc va ((danh dao) OR (doanh cao)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang o hoi. hieu ((ve am) OR (va am)) thuc va ((danh dao) or (doanh cao)) cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang o hoi. hieu ((ve am) OR (va am)) thuc va ((danh dao) or (doanh cao)) cua viet*.