Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
danh vai » danh sai, danh va, doanh van
su triet » su viet, su tien, ve triet
nang co » nang cao, nang doc, nang noi
hieu va » lieu va
thuc va » thuc vat, thuc day
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
co hoi » co hoc, co loi
vai su » va su, van su, lai su

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