Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
khoa hoi » khoan hoi, khoa hoc, khoa doi
hanh hai » thanh hai, nhanh hai, hang hai
nam thuc » nam thuoc, am thuc, nam thu
hieu hoa » tieu hoa, dieu hoa, hiep hoa
hoa hoi » hoa hoc, hoa doi, hoc hoi
hoa nam » hoai nam, hoat nam, hoa am
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ky lang » ky dang, ky tang, tay lang
hai cua » thai cua, dai cua, hoi cua
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ky lang) or (ky nang)) ((hoa hoi) OR (khoa hoi)). hieu hoa nam thuc va hanh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky nang)) ((hoa hoi) OR (khoa hoi)). hieu hoa nam thuc va hanh hai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) or (ky nang)) ((hoa hoi) OR (khoa hoi)). hieu hoa nam thuc va hanh hai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) or (ky nang)) ((hoa hoi) OR (khoa hoi)). hieu hoa nam thuc va hanh hai cua triet*.