Perhaps you should try some spelling variations:
mai khoa » tai khoa, may khoa, dai khoa
cham luc » cham soc, nhan luc, cham cuu
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
hanh ly » khanh ly, hanh ky, hang ly
va hanh » van hanh, va thanh, va danh
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
ma hoi » xa hoi, ma hoa, me hoi
ly cua » le cua

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 y nang ((ma hoi) or (((mai hoi) or (mai khoa)))). hieu van cham luc va hanh ly cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((ma hoi) OR (((mai hoi) OR (mai khoa)))). hieu van cham luc va hanh ly cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((ma hoi) or (((mai hoi) or (mai khoa)))). hieu van cham luc va hanh ly cua tre*.