Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
va triet » va thiet, va trien, ve triet
thi hanh » thi thanh
sach thi » sach thu, sach tai, sach thieu
va danh » va dinh, dia danh, va thanh
tu sach » thu sach, su sach, te sach
vu tham » va tham, vu kham, vu cham
hieu vu » hieu va, hieu ve, hieu su
hanh xa » hanh va, hanh ma, hanh xu
va hanh » van hanh, va thanh, ban hanh
va dan » ca dan, va dao, va dau
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: tu sach thi hanh xa hoi. hieu vu tham thuc ((va hanh) or (((va danh) or (va dan)))) lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi hanh xa hoi. hieu vu tham thuc ((va hanh) OR (((va danh) OR (va dan)))) lam va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach thi hanh xa hoi. hieu vu tham thuc ((va hanh) or (((va danh) or (va dan)))) lam va triet*.