Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
va doanh » van doanh, vay doanh, va danh
doanh va » doan va, doanh tai, doanh cua
ma hoi » mai hoi, xa hoi, me hoi
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
va cua » va chua, via cua, ca cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ky nang ((ma hoi) OR (ma hoa)). lieu va cam xuc va doanh va cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (doc sach)) ky nang ((ma hoi) OR (ma hoa)). lieu va cam xuc va doanh va cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (doc sach)) ky nang ((ma hoi) OR (ma hoa)). lieu va cam xuc va doanh va cua triet*.