Perhaps you should try some spelling variations:
mai khoa » tai khoa, may khoa, dai khoa
te sach » toc sach
hieu ke » hieu kem, chieu ke, hieu ky
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
ke cau » ket cau
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca cua
cua su » qua su

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