Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
ve triet » va trien
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien
qua tham » qua cham, qua than, qua thanh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va danh, ban hanh
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh

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 ky dang xa hoi. hieu qua tham thuc ((va hanh) OR (va thanh)) vi ((su triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang xa hoi. hieu qua tham thuc ((va hanh) or (va thanh)) vi ((su triet) OR (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: su sach ky dang xa hoi. hieu qua tham thuc ((va hanh) or (va thanh)) vi ((su triet) OR (ve triet))*.