Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
ky dang » ky nang, ky danh
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cao xuc » cam xuc, cao duc, cao suc
hoa dai » hoa dan, hoc dai
hoa doi » hoc doi, xoa doi, hoa duoc
va dan » ca dan, va dao, va dau
vi cua » vai cua, di cua
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky dang ((hoa doi) OR (hoa dai)). hieu va cao xuc ((va hanh) or (va dan)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky dang ((hoa doi) OR (hoa dai)). hieu va cao xuc ((va hanh) OR (va dan)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky dang ((hoa doi) OR (hoa dai)). hieu va cao xuc ((va hanh) or (va dan)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky dang ((hoa doi) OR (hoa dai)). hieu va cao xuc ((va hanh) or (va dan)) vi cua triet*.