Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
phap thuc » phap thu, phap hoc, phap tu
doc sach » hoc sach, toc sach, nuoc sach
hanh hai » thanh hai, nhanh hai, hang hai
va triet » va thiet, va trien, ve triet
hieu vi » hieu voi, hieu va, hieu ve
sach ty » sach y, sach tu, sach thu
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ty nang » ky nang, ty xang, ty hang
vi phap » va phap, vi pham, vi phan
ma hoi » mai hoi, ma hoa, me hoi

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: doc sach ty nang ((ma hoi) OR (xa hoi)). hieu vi phap thuc va hanh hai ((cua triet) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ty nang ((ma hoi) or (xa hoi)). hieu vi phap thuc va hanh hai ((cua triet) OR (va triet))~".
• Adding a wildcard symbol may retrieve word variants: doc sach ty nang ((ma hoi) or (xa hoi)). hieu vi phap thuc va hanh hai ((cua triet) OR (va triet))*.