Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vai » danh sai, danh va, doanh van
thuc day » thuc dan, thuc vat
thuc va » thuc vat, thuc dan
vai cua » dai cua, hai cua, lai cua
nang co » nang cao, nang doc, nang noi
hieu va » lieu va, hieu qua
su sac » su sach, su cac
co loi » co hoi
su xac » pu xac, su cac
va am » va lam, va cam

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: ((su sac) OR (su xac)) ky nang co loi. hieu va am ((thuc va) OR (thuc day)) danh vai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su xac)) ky nang co loi. hieu va am ((thuc va) or (thuc day)) danh vai cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su xac)) ky nang co loi. hieu va am ((thuc va) or (thuc day)) danh vai cua triet*.