Perhaps you should try some spelling variations:
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
va chua » vua chua, ca chua, va chu
chua su » cua su, chua cu, chua tu
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi
va cau » van cau, va cac, va dau
luc va » duc va, tuc va, loc va

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