Perhaps you should try some spelling variations:
hanh vit » hanh vi, danh viet, hanh tiet
nam thuc » nam thuoc, am thuc, nam thu
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
ky sang » ky dang, ky tang, duy sang
ca viet » va viet, co viet, hoa viet
ve nam » he nam, va nam, le nam
ma hoi » mai hoi, xa hoi, me hoi
vit ca » viet ca, viet cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ky sang) or (ky nang)) ((ma hoi) or (ma hoa)). hieu ve nam thuc va hanh vit ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky sang) OR (ky nang)) ((ma hoi) OR (ma hoa)). hieu ve nam thuc va hanh vit ca viet.
• Adding a wildcard symbol may retrieve word variants: su sach ((ky sang) or (ky nang)) ((ma hoi) or (ma hoa)). hieu ve nam thuc va hanh vit ca viet*.