Perhaps you should try some spelling variations:
tham thuc » pham thuc, tam thuc, thai thuc
nham thuc » nhan thuc, nam thuc, nham thu
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty dang » ty xang, ky dang, ty hang
dang xa » dang xay, lang xa, dang ha
va hanh » van hanh, va thanh, va danh
vi su » va su, ve su, ki su

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: su sach ty dang xa hoi. hieu qua ((nham thuc) OR (tham thuc)) va hanh vi su triet~.
• Adding a wildcard symbol may retrieve word variants: su sach ty dang xa hoi. hieu qua ((nham thuc) or (tham thuc)) va hanh vi su triet*.