Perhaps you should try some spelling variations:
day danh » day manh, dai danh, dao danh
thuc day » thuc dan, thuc vat
nam thuc » nam thuoc, am thuc, nam thu
hieu van » hieu va, thien van, lieu va
tu cach » tu cac
danh vi » hanh vi, dinh vi, danh di
lap hai » lap tai, lap lai, lap hoat
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
su sach » so sach, vu sach
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ((ky tang) or (ky dang)) lap hai. hieu van nam thuc day danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ((ky tang) OR (ky dang)) lap hai. hieu van nam thuc day danh vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ((ky tang) or (ky dang)) lap hai. hieu van nam thuc day danh vi cua te*.