Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
toc sach » hoc sach, doc sach, thuoc sach
hanh hai » thanh hai, nhanh hai, hang hai
su triet » su viet, su tien, ve triet
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu vi » hieu voi, hieu va, hieu ve
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, ma hoa, me hoi
hai su » hai vu, lai su, hai so

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: toc sach ty nang ((ma hoi) OR (xa hoi)). hieu vi pham thuc va hanh hai su triet~.
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang ((ma hoi) or (xa hoi)). hieu vi pham thuc va hanh hai su triet*.