Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tinh vien » sinh vien, tinh dien, tinh viet
nam thuc » nam thuoc, am thuc, nam thu
vien cua » viec cua, dien cua, tien cua
hieu van » thien van, lieu va, hieu ve
cao hoi » cau hoi, co hoi, tao hoi
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)). ((hieu van) or (hieu va)) nam thuc va tinh vien cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((cao hoi) OR (cao hoc)). ((hieu van) OR (hieu va)) nam thuc va tinh vien cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((cao hoi) OR (cao hoc)). ((hieu van) or (hieu va)) nam thuc va tinh vien cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((cao hoi) OR (cao hoc)). ((hieu van) or (hieu va)) nam thuc va tinh vien cua triet*.