Perhaps you should try some spelling variations:
tinh vien » sinh vien, tinh dien, tinh viet
thien van » thi van
va triet » va thiet, va trien, ve triet
nam thuc » nam thuoc, am thuc, nam thu
cao hoi » cau hoi, co hoi, tao hoi
vien va » dien va, vien da, tien va
cao hoc » co hoc, cho hoc, chat hoc
va tinh » may tinh
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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 ((cao hoi) or (cao hoc)). ((thien van) or (hieu va)) nam thuc va tinh vien va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((cao hoi) OR (cao hoc)). ((thien van) OR (hieu va)) nam thuc va tinh vien va triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((cao hoi) or (cao hoc)). ((thien van) or (hieu va)) nam thuc va tinh vien va triet*.