Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
va triet » va thiet, va trien, ve triet
va thanh » gia thanh, ban thanh, va tinh
thi hanh » thi thanh
va hanh » van hanh, va danh, ban hanh
su sach » vu sach
hieu va » lieu va, hieu qua
hanh xa » hanh va, hanh ma, hanh xu
so sach » so sanh, bo sach, co sach
va tham » van tham, va cham, va thuat
lam va » nam va, dam va, lam ha

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) or (so sach)) thi hanh xa hoi. hieu va tham thuc ((va hanh) OR (va thanh)) lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) thi hanh xa hoi. hieu va tham thuc ((va hanh) OR (va thanh)) lam va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) thi hanh xa hoi. hieu va tham thuc ((va hanh) OR (va thanh)) lam va triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) thi hanh xa hoi. hieu va tham thuc ((va hanh) OR (va thanh)) lam va triet*.