Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh than » hanh han, hanh nhan, hanh phan
khoa hoi » khoan hoi, khoa hoc, khoa doi
than cua » nhan cua, thai cua, ban cua
nam thuc » nam thuoc, am thuc, nam thu
hoa doi » hoa dai, hoc doi, xoa doi
hieu ve » hieu va, hieu van
hoa hoi » hoa hoc, hoc hoi, hoa moi
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
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 (khoa hoi))) or (hoa doi)). hieu ve nam thuc va hanh than cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky tang ((((hoa hoi) OR (khoa hoi))) OR (hoa doi)). hieu ve nam thuc va hanh than cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky tang ((((hoa hoi) OR (khoa hoi))) or (hoa doi)). hieu ve nam thuc va hanh than cua triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky tang ((((hoa hoi) OR (khoa hoi))) or (hoa doi)). hieu ve nam thuc va hanh than cua triet*.