Perhaps you should try some spelling variations:
mat cua » ma cua, manh cua, mang cua
cat cua » chat cua, ca cua, cau cua
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
ma hoi » xa hoi, ma hoa, me hoi
va cam » va cham, va cac, va cao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang ((ma hoi) OR (mai hoi)). hieu va cam luc va hanh ((cat cua) or (mat cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((ma hoi) OR (mai hoi)). hieu va cam luc va hanh ((cat cua) OR (mat cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((ma hoi) OR (mai hoi)). hieu va cam luc va hanh ((cat cua) or (mat cua)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((ma hoi) OR (mai hoi)). hieu va cam luc va hanh ((cat cua) or (mat cua)) triet*.