Perhaps you should try some spelling variations:
cuc triet » cua triet, su triet, cac trieu
nam thuc » nam thuoc, am thuc, nam thu
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
hieu ve » hieu va, hieu van
hoc doi » hoc dai, hoc noi, hoc moi
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
ve nam » he nam, va nam, le nam
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky tang ((hoa hoi) or (hoc doi)). hieu ve nam thuc ((va hanh) or (va danh)) tai cuc triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky tang ((hoa hoi) OR (hoc doi)). hieu ve nam thuc ((va hanh) OR (va danh)) tai cuc triet.
• Adding a wildcard symbol may retrieve word variants: te sac ky tang ((hoa hoi) or (hoc doi)). hieu ve nam thuc ((va hanh) or (va danh)) tai cuc triet*.