Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
thi hanh » thi thanh
nam thuc » nam thuoc, am thuc, nam thu
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
hanh xa » hanh va, hanh ma, hanh xu
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
ve nam » he nam, va nam, le nam
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 thi hanh xa hoi. hieu ve nam thuc ((va hanh) or (va danh)) lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thi hanh xa hoi. hieu ve nam thuc ((va hanh) OR (va danh)) lam va triet.
• Adding a wildcard symbol may retrieve word variants: su sach thi hanh xa hoi. hieu ve nam thuc ((va hanh) or (va danh)) lam va triet*.