Perhaps you should try some spelling variations:
mai khoa » tai khoa, may khoa, dai khoa
mai khoi » tai khoa, cac khoi, dai khoa
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
te sach » toc sach
y nang » ky nang, ly nang, v nang
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa
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 khoi) OR (mai khoa)))). hieu ve 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 khoi) OR (mai khoa)))). hieu ve cau luc va hanh va cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((ma hoi) or (((mai khoi) OR (mai khoa)))). hieu ve cau luc va hanh va cua su".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((ma hoi) or (((mai khoi) OR (mai khoa)))). hieu ve cau luc va hanh va cua su*.