Perhaps you should try some spelling variations:
dang hoa » dang hoai, dang khoa, dong hoa
nam thuc » nam thuoc, am thuc, nam thu
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
su triet » su viet, ve triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
hoa hoi » khoa hoi, hoa hoc, hoa doi
hieu ly » hieu ky, lieu ly, dieu ly
su tien » su kien, su hien, tu tieng

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 dang hoa hoi. hieu ly nam thuc van hanh vai ((su triet) OR (su tien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang hoa hoi. hieu ly nam thuc van hanh vai ((su triet) OR (su tien))".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang hoa hoi. hieu ly nam thuc van hanh vai ((su triet) OR (su tien))*.