Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
thu sach » tu sach, thuat sach, thuoc sach
nam thuc » nam thuoc, am thuc, nam thu
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
va hanh » van hanh, va danh, ban hanh
ky tang » ky nang, kho tang, ky trong
va nam » van nam, ha nam, va nay
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ky tang) or (ky dang)) xa hoi. hieu va nam thuc ((va hanh) or (va thanh)) va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky tang) OR (ky dang)) xa hoi. hieu va nam thuc ((va hanh) OR (va thanh)) va cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky tang) or (ky dang)) xa hoi. hieu va nam thuc ((va hanh) or (va thanh)) va cua triet*.