Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
dai hoi » dai hoc, dai hai, dai moi
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
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: vu sac ky nang ((dai hoi) or (mai khoi)). hieu van nam thuc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang ((dai hoi) OR (mai khoi)). hieu van nam thuc va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: vu sac ky nang ((dai hoi) or (mai khoi)). hieu van nam thuc va hanh vi cua te*.