Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang hai » dang khai, hang hai, dung hai
thuc day » thuc dan, thuc vat
thuc va » thuc vat, thuc dan
nang co » nang cao, nang doc, nang noi
hai cua » thai cua, dai cua, hoi cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
co hoi » co hoc, co loi
va cam » va cham, va cac, va cao
va am » va lam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang co hoi. hieu ((va am) OR (va cam)) ((thuc va) OR (thuc day)) dang hai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang co hoi. hieu ((va am) OR (va cam)) ((thuc va) or (thuc day)) dang hai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang co hoi. hieu ((va am) OR (va cam)) ((thuc va) or (thuc day)) dang hai cua triet*.